What to Do When a Fridge Left Uncleaned Causes an Odour Complaint

A Monday morning in February. A five storey office building off Sir John Rogerson's Quay, roughly two hundred desks, a shared kitchen on each floor. The office manager rang us before nine, because two people on the third floor had put a complaint in writing and one had gone home.

She told me they had already cleaned it twice over the weekend with bleach and it still smelled. We opened the door and the cabinet was spotless. The smell was coming from the drip tray underneath, and from the door seal, which had gone black in the folds.

The short answer

If an office fridge still smells after cleaning, the source is not on the visible surfaces. It is in one of four hidden places, and the reason nobody has cleaned them is almost always that the inside of the fridge is not in your cleaning contract.

The drip tray or evaporator tray underneath or behind the unit. The defrost drain channel at the back of the cabinet, and its drain hole. The door gasket, specifically inside the folds. The cabinet insulation, where odour has passed through a cracked or crazed liner. Nobody's job. The fridge interior is excluded from most office cleaning specifications.

That fifth one is not a hidden place. It is the reason the other four are still there.

First, the uncomfortable part: your cleaning contract probably excludes the inside of the fridge

Before you have a difficult conversation with your cleaning contractor, go and read your specification. Most Dublin office cleaning specifications list kitchen tasks as worktops, sink and taps, bin change, appliance exteriors and floor.

Look at that phrase again. Appliance exteriors. That word is doing an enormous amount of quiet work, and almost nobody notices it at signing.

This is not dishonesty by your contractor. It is a scoping convention, and it exists for three genuinely practical reasons.

A cleaning contractor cannot bin an employee's property. Nobody has given them that authority, and the first time they do it without cover, there is a complaint on somebody's desk by lunchtime.

A fridge cannot be emptied and cleaned during a daily clean window. The daily visit is often forty minutes for a whole floor.

And defrosting takes hours, not minutes. You cannot defrost a freezer compartment between 06:00 and 07:00 and still have the kitchen usable at nine.

All three of those are solvable. None of them solves itself, and none of them gets solved until somebody writes the task down with a frequency and an owner.

Why the fridge still smells after you have cleaned it

The drip tray and evaporator tray

Underneath or behind the cabinet there is a shallow tray. Its job is to catch defrost water so it can evaporate off the warmth of the compressor.

It never dries fully. It collects the sugars, milk and food particles that were carried down with the water, and over months it grows a biofilm.

Biofilm is worth understanding, because it explains why your last clean failed. It is a layer of micro organisms living inside a sticky matrix they produce themselves, and that matrix physically shields what is underneath it. Spraying disinfectant on top of a biofilm does very little. It has to come off mechanically first, then be treated, then be dried.

On that Sir John Rogerson's Quay job, we had a torch on the shelf runners and found nothing at all. The smell was coming from a tray under the compressor that had not been touched since the fridge was delivered.

How to check: pull the unit out and look underneath at the back.

The defrost drain channel and drain hole

Inside the cabinet, at the back wall, there is a small gutter with a hole at its centre. It carries defrost water out to the tray.

It blocks with food debris and biofilm. When it does, water stops draining and sits in the base of the cabinet underneath the salad drawers, where nobody looks.

Stagnant water in a cold dark box is exactly what it sounds like. It is also the easiest of the four to fix once you know it is there.

How to check: look for standing water under the drawers, or a drawer base that is always slightly damp.

The door gasket

The gasket is a flexible magnetic bellows seal with concertina folds around the whole door. It is the single most commonly missed component in office kitchens, for the simple reason that it looks perfectly clean when the door is shut.

Spills and condensation wick into the folds and stay there. Black or dark green growth in the folds is mould, commonly Cladosporium and similar genera, and it is a genuine irritant for anyone with asthma or allergy.

How to check: run a gloved finger along the inside of each fold. If the gasket is perished, hardened or torn, it is a replacement part rather than a cleaning task, and that is a job for whoever maintains the appliance.

The cabinet insulation

Between the inner liner and the outer casing there is a layer of foam. If the plastic liner is cracked, crazed or drilled, odour compounds pass into that foam and are then released back into the cabinet indefinitely.

This is the point of no return, and I would rather say it plainly than sell somebody a second clean. If the liner is cracked and the smell returns within days of a full professional clean, the fridge is finished. No cleaning contractor can fix it.

How to check: inspect the liner corners and the shelf support mouldings for hairline cracks. Units that have been over tightened, or had shelving forced back into place, are the usual candidates.

How to work out which one it is, in ten minutes

Safety note. An electrical or refrigerant smell is not a cleaning job. Isolate the appliance and get a qualified appliance engineer to it. Nobody should be cleaning inside a unit that smells of burning, and that includes us.

Where the odour has moved into soft seating in an open plan breakout area, the fridge is only half the job. That becomes a fabric problem, and it is worth handling at the same visit rather than a fortnight later. Our washroom cleaning crews deal with the same drain and trap logic in wet areas, and the two often turn out to be connected.

The right way to clean a staff fridge that smells, step by step

1. Give notice, in writing, with a date and a time. Seven days minimum. Name the cutoff, for example 16:00 on the Friday, and say clearly that anything left after it will be disposed of. This is the step that makes the whole thing impersonal.
2. Put a second notice on the fridge door itself, two days out. People do not read all their email. They do read a sign on the thing they are opening.
3. Schedule it out of hours. A fridge cannot be emptied, defrosted and dried during a lunchtime. Evening or weekend, every time.
4. Empty completely and sort into three streams. Food waste, recyclable packaging, and personal items such as containers and lunch boxes, which go into a labelled box on the counter for collection rather than straight into a bin.
5. Isolate the appliance at the socket and prop the door open. Nobody works inside a live appliance with wet cloths. Allow ten minutes for the interior to come up slightly, which makes everything easier to lift.
6. Remove every shelf, drawer, runner and door balcony, and wash them separately in warm water with detergent. Do not put cold glass shelves into hot water. They crack, and then you are buying parts.
7. Defrost the freezer compartment fully. Warm water in a bowl, or the appliance's own defrost function. Never a knife, never a heat gun. Allow one to three hours, which is why step three exists.
8. Clean the interior with detergent first, then an enzyme based product on any organic residue. Detergent lifts the fat and food film. Enzymes digest the protein, starch and fat residue that is actually producing the smell. Give the enzyme product its stated dwell time rather than wiping it straight off.
9. Clean the gasket folds with a soft brush, or a cloth wrapped over a plastic scraper. Open every fold, all the way round. This is the step everyone skips and it is often the whole answer.
10. Clear the defrost drain channel and hole, then pull the unit out and clean the drip tray, the coils area and the floor behind and beneath it. Physically remove the biofilm, then sanitise, then dry. In that order, or you have wasted the chemical.
11. Sanitise food contact surfaces with a food safe sanitiser, respect the contact time on the label, and rinse where the product requires it. Then dry everything completely. Moisture left behind restarts the entire process within weeks.
12. Restore power, let the unit come back to temperature before restocking, check it with a thermometer rather than trusting the dial, and log the clean with a date, a name and photographs.

Allow around an hour per under counter unit, plus defrost time. Anyone quoting you ten minutes has not done step ten.

What not to use

Chlorine bleach. It does not digest organic residue, it can pit and mark stainless and aluminium trim, it is a poor choice on food contact surfaces without a proper rinse, and it swaps one strong smell for another. If your fridge currently smells of bleach on top of the original smell, this is why.

Strongly perfumed all purpose sprays. They mask rather than remove, and the perfume transfers into food.

Abrasive pads on the liner. Scratches and crazing are the route by which odour reaches the insulation, and that is the one damage type that ends the appliance.

A knife or any sharp tool to chip ice. It punctures the evaporator and destroys the fridge.

What bicarbonate of soda, activated charcoal and ozone actually do

Bicarbonate of soda and activated charcoal are adsorbents. They mop up residual airborne odour molecules after the source has gone. They are a finishing step, not a treatment. Activated charcoal is the more effective of the two by a distance, because of its surface area, and it needs replacing periodically rather than sitting there for a year.

Ozone is a different matter. Ozone generators do oxidise odour compounds and can genuinely neutralise residual smell. But ozone is a respiratory irritant, and treatment must only ever happen in a sealed, unoccupied space, by a trained operator, with a proper ventilation and re entry period afterwards.

It is not something to run in an occupied Dublin office kitchen on a Tuesday afternoon. And it will not save a fridge whose insulation has absorbed the odour, because it does not penetrate the foam. It is a legitimate tool that gets used badly far more often than it gets used well.

A real site example: the fridge we told a client not to clean again

A serviced office block in the Sandyford Business District, roughly eighty desks, a shared kitchen with two under counter fridges. We deep cleaned both out of hours on a Saturday in October, same method, same products, same two operatives.

One came back perfect and has been fine ever since. The other smelled again by the Thursday.

We pulled it out and looked at the base of the liner. There were hairline cracks running out from a shelf support where a shelf had clearly been forced back in at some point, probably years earlier by somebody who has long since left.

We told the client that unit was finished and that they should replace it rather than pay us to clean it a second time. That conversation cost us the second clean. It kept the contract, and both fridges are now in the periodic schedule, one of them a new one.

If the smell returns within a week of a full professional clean, you have an appliance problem, not a cleaning problem. Paying for another clean at that point is paying for something that cannot work.

How to write the fridge into your cleaning specification

A task only gets done reliably when it has four things: a defined task, a frequency, a named accountable party, and a record. Goodwill is not a frequency, and "the cleaners will keep an eye on it" is not an accountable party.

Here is wording you can lift straight into a specification or a contract variation, whoever your contractor is.

Kitchen appliance interiors. Contractor to fully clean the interior of all staff fridges and freezers on a monthly basis, out of hours, including all shelves, drawers, door balconies, door gasket folds, defrost drain channel and drain hole, and the drip or evaporator tray beneath or behind the unit. The unit shall be isolated, emptied, cleaned with detergent followed by an enzyme based product on organic residue, sanitised with a food safe sanitiser, dried fully and restored to operating temperature. The Client is responsible for issuing a staff amnesty notice not less than seven days before each scheduled clean and for confirming the disposal cutoff. Contractor will dispose of all remaining foodstuffs after the stated cutoff. Completion to be logged with date, operative name and photographic record.

Every clause in that paragraph is there for a reason:

The amnesty clause protects the contractor from binning somebody's property without authority, which is the reason this task gets quietly avoided in the first place.

The out of hours clause is what makes the task physically possible. Without it, nobody can defrost anything.

The component list stops the job becoming a wipe of the shelves. Naming the gasket folds and the drip tray is the difference between a clean and a real clean.

The enzyme clause specifies chemistry rather than leaving it to whoever turns up with whatever is on the trolley.

The photographic record clause is the bit the office manager forwards to the person who complained.

Catalin's note: The reason we push clients to put this in writing is not to sell an extra hour. It is that an unwritten task is an argument waiting to happen, and the person who loses that argument is nearly always the office manager, who did nothing wrong.

The staff fridge amnesty policy, and how to bin someone's lunch without a row

The technical part of this problem is easy. The social part is what makes people avoid it for months.

A shared fridge is a small commons, and the office manager is the person who has to bin a colleague's property without starting a fight. The way you do that is with a published, recurring, dated rule, so that the decision belongs to the policy rather than to you.

Staff kitchen notice. The fridge will be emptied and deep cleaned on Friday at 16:00. Please take home or label anything you want to keep before then. Everything left in the fridge after 16:00 on Friday will be disposed of, including containers. Personal lunch boxes and containers found will be placed in the labelled box on the counter until Wednesday, then disposed of. Thank you.

Four rules make an amnesty actually work:

It has to be recurring and dated, not a one off reaction to a complaint. A recurring rule is nobody's opinion.

It has to be enforced the first time, or it dies quietly and you are back here in March.

Containers get one grace period on the counter. That single concession removes most of the resistance you would otherwise get.

Never name the person whose food caused the smell. Not in the notice, not in the email, not verbally in the kitchen. The moment you do, the policy becomes a personal accusation, and the next complaint will not be about the fridge.

An HR lead in a Dublin 2 professional services office asked us straight out whether she was actually allowed to throw out somebody's lunch. The answer is yes, once the rule is published in advance, dated, applied to everybody equally, and the containers get their grace period. What causes grievances is not disposal. It is disposal that looks like a personal judgment.

Is a smelly office fridge actually a health risk?

Mostly it is unpleasant rather than dangerous. But there are three real risks and one compliance dimension, and it is worth being proportionate about all four.

Listeria and the cold storage problem

Listeria monocytogenes is unusual among foodborne bacteria because it can grow at refrigeration temperatures. A fridge that is neither clean nor held cold enough is not a safe store, regardless of how it looks.

That is exactly why food safety guidance covers temperature and cleaning together rather than treating them as separate housekeeping items.

Mould and staff with asthma or allergy

Gasket and cabinet mould is a genuine irritant. A staff member with asthma reporting symptoms after a fridge complaint is a health and safety matter, not a moaning matter, and it should be recorded as one.

This comes up most often in Dublin 4 and Ballsbridge clinics, where a staff fridge can sit a few metres from clinical space and the tolerance for it is understandably lower.

Cross contamination in a shared fridge

Raw food, leaking containers, unlabelled items and no bottom shelf discipline. The rule is short enough to put on the door: raw and unpackaged food does not belong in a shared staff fridge, and everything gets a lid.

Temperature, records, and when this becomes a regulated matter

The Food Safety Authority of Ireland advises that chilled food is held between 0 and 5 degrees Celsius, and notes that setting a fridge to 3 or 4 degrees Celsius helps ensure the food itself stays inside that range. Where a probe thermometer is used to check food, the temperature should be recorded, and probes should be sanitised before and after use and calibrated regularly.

If your canteen or kitchen is a registered food business, fridge temperature monitoring and cleaning both sit inside your HACCP based procedures, and both are things the HSE Environmental Health Service will look at on an inspection.

A staff only fridge in an ordinary office is usually not a registered food business. The workplace welfare duty still applies. Under the Safety, Health and Welfare at Work (General Application) Regulations, S.I. No. 299 of 2007, employers must provide suitable and adequate eating and welfare facilities, and a fridge that is unusable because of odour or mould is not a suitable facility.

Even where no regulator is involved, a dated cleaning log and a temperature log are what turn "we clean it sometimes" into a system you can stand over when somebody asks.

When to sort it in house and when to bring in a contractor

Handle it in house when there is one identified spoiled item, the smell is confined to the cabinet, the unit is small enough to empty in ten minutes, somebody is willing to do it, it is not a recurring problem, and nobody has complained formally.

Bring in a contractor when the smell has survived a clean you already did, the unit needs to be pulled out for the drip tray and the void behind it, there is more than one fridge or a canteen scale unit, the kitchen cannot be closed during the day, somebody has complained in writing and you need a dated record with photographs, the fridge sits inside a registered food business, or you want the task moved permanently into a specification so it stops recurring.

Call an appliance engineer, not a cleaner, when there is a burning, chemical or fish like electrical smell, a suspected refrigerant leak, the unit is not holding temperature, or the gasket is perished and needs replacing.

The objection we hear most is a fair one: can we not just put staff on a rota? You can, and it works for about six weeks. It fails for three specific reasons, none of which are about willingness. The person on the rota cannot bin a colleague's food, cannot pull the unit out and deal with the tray, and cannot do any of it out of hours. Rotas are not a discipline problem. They are a scope problem wearing a rota's clothes.

Preventing the next one

Put the fridge interior in the cleaning specification with a monthly frequency and a quarterly pull out.

Run a standing weekly amnesty with a fixed day and time. The same day, every week, so nobody has to be told.

Label everything. Date labels and a marker on the counter, not a rule people cannot physically comply with.

Ban raw and unpackaged food from the shared staff fridge.

Put a thermometer in the fridge and actually check it. Fridges drift, and a warm fridge spoils food faster, which produces the exact smell you are trying to prevent.

Right size the fridge. Overfilled units have poor air circulation, warm spots and spills nobody can see. A second small unit is cheaper than a recurring complaint, and considerably cheaper than a hybrid working pattern where food sits from Thursday to the following Tuesday.

Deal with the neighbours at the same visit: the microwave interior, the dishwasher filter, the coffee machine drip tray and the bin store. Those are your next three complaints, roughly in that order.

Log every clean with a date, a name and a photograph, and keep the log somewhere the office manager can find it in thirty seconds.

One aside worth knowing. Fridge interiors are a classic flashpoint in dilapidations when a tenant leaves a serviced office, so if you are approaching a lease end, this belongs on the same list as everything else in the end of tenancy cleaning scope rather than being discovered by a surveyor.

What a professional fridge and kitchen clean involves in Dublin, and what it costs

We will not publish a figure, because the number moves a lot depending on what is actually in your kitchen, and a price on a page would mislead you either way.

On timing, be realistic with yourself. A single under counter unit done properly, including the gasket folds, the drain channel and the drip tray, is about an hour of work plus defrost time. A full staff kitchen deep clean is an evening or a weekend visit, not a slot squeezed into a Tuesday.

Shared kitchens on multi let floors in the IFSC and the Docklands add a wrinkle, because access and out of hours arrangements usually run through the managing agent rather than the tenant. Worth sorting before you book, not after.

Frequently asked questions

Why does my fridge still smell after I have cleaned it? Because the source is not on the visible surfaces. Check the drip tray under or behind the unit, the defrost drain channel at the back of the cabinet, and the folds of the door gasket. If the smell returns within days of a full clean, odour has reached the insulation and the unit needs replacing.

Does office cleaning include the inside of the fridge? Usually not. Most Dublin office cleaning specifications cover worktops, sink, bins, floors and appliance exteriors. The fridge interior is rarely named, so it is nobody's task. It can be added as a scheduled monthly item with an amnesty clause and a photographic record.

Who is responsible for cleaning the office fridge? Whoever the specification says, and if it says nothing, nobody. The workable split is that the employer sets and publishes the amnesty policy, the cleaning contractor performs the scheduled clean out of hours, and both are recorded. Leaving it to goodwill fails within a month.

How do you get a bad smell out of a fridge permanently? Remove the source rather than mask it. Strip the unit, use detergent then an enzyme based product on organic residue, clear the drain channel, clean the drip tray and the gasket folds, sanitise, dry fully, then use activated charcoal for any residual odour.

How often should a workplace fridge be cleaned? Wipe the exterior daily, remove spoiled items weekly under a standing amnesty, do a full interior clean including gasket and drain monthly, and pull the unit out for a full defrost and rear clean quarterly. Higher use canteen fridges need the interior done fortnightly.

Is bicarbonate of soda or activated charcoal better for fridge smells? Activated charcoal, because of its far greater surface area. Both are adsorbents that capture residual airborne odour, and neither removes the source. Use them after cleaning rather than instead of it, and replace them periodically rather than leaving the same box in for a year.

Can you use bleach inside a fridge? It is a poor choice. Chlorine bleach does not digest food residue, can mark stainless and aluminium trim, needs rinsing on food contact surfaces, and replaces one strong smell with another. Use detergent, then an enzyme based product, then a food safe sanitiser with the stated contact time.

Do ozone treatments remove fridge odours safely? Ozone can oxidise residual odour compounds, but it is a respiratory irritant and must only be used in a sealed unoccupied space by a trained operator with a proper re entry period. It will not fix odour that has soaked into the cabinet insulation, because it does not penetrate the foam.

What temperature should an office fridge be set to in Ireland? The Food Safety Authority of Ireland advises chilled food be held between 0 and 5 degrees Celsius, and notes that setting the appliance to 3 or 4 degrees Celsius helps keep food inside that range. Put a thermometer in the unit and check it rather than trusting the dial.

When should you just replace the fridge instead of cleaning it? When the smell returns within a week of a full professional clean, when the inner liner is cracked or crazed, when the gasket is perished and no longer available, or when the unit is not holding temperature. At that point you are paying for cleans that cannot succeed.

Getting it fixed, and making sure it does not come back

If you have a complaint on your desk this week. We do out of hours staff kitchen and fridge deep cleans across Dublin, with photographic sign off, so the person who complained gets a real answer rather than a promise. Evening or weekend, nobody's day disrupted, kitchen usable in the morning.

If you want it to stop happening, book a free site survey and specification review. We will walk the kitchen, open the fridge, pull it out and look behind it, and tell you exactly what is and is not in your current contract. We will do that whoever your incumbent contractor is, at no cost and with no obligation, because half the time the honest answer is that your existing contractor will add the clause for you and everyone is better off.

Free site survey and no obligation quote. Out of hours and weekend scheduling as standard. Documented sign off with dated photographs and a named account manager. Eco friendly products where the standard allows, and direct access to me rather than a call centre. Our redo guarantee: if your clean is not perfect, we will do it again, for free.

That fridge off Sir John Rogerson's Quay is still in service. It is on a monthly interior clean with a quarterly pull out, written into the specification with a frequency and a name against it, and there has not been another complaint since February.

Call 086 083 6141, email enquiries@premiercontractcleaning.ie, or talk to us about your kitchen specification. You can also read more about our office cleaning in Dublin and our wider commercial cleaning services in Dublin, or see what our clients say.

Publishing notes

Title tag: Office Fridge Smells Bad? How to Fix It for Good | Dublin Meta description: Office fridge smells bad even after cleaning? Here is why, how to fix it properly, and the contract clause that stops it recurring. Dublin advice. URL slug: /office-fridge-smells-bad-how-to-fix/

Catalin Fatul

Catalin Fatul is the founder and expert behind Premier Contract Cleaning, dedicated to providing top-notch cleaning solutions and tips. With a passion for cleanliness and a commitment to quality, Catalin brings years of experience in the cleaning industry to help readers maintain pristine spaces. Whether it's offering the latest cleaning hacks or recommending the best products, Catalin's mission is to make cleaning efficient, effective, and enjoyable.