Washing Machine Smells Bad - How to Clean It in Bolton

Published April 2026 | Washing Machine Smells Bad How to Clean It

In the First 10 Minutes

A bad smell from your washing machine usually means one of three things: mould on the door seal, a blocked or dirty filter, or bacteria building up in the drum. None of these are dangerous, but leaving it will make things worse - and some machines, particularly older Hotpoint and Beko models, can develop persistent odours that surface cleaning alone won't fix.

Do this straight away:

1. Open the door and pull back the rubber door seal. You're looking for black or grey mould, trapped lint, or standing water. If it smells the moment you peel back the rubber, that's your main culprit.
2. Locate the filter access panel - usually a small square door at the bottom front of the machine. Place a towel underneath before you open it. Unscrew the cap slowly and let any water drain into the towel.
3. Pull the detergent drawer out completely and check underneath it for mould or compacted powder residue. Bosch and Samsung machines often accumulate residue here because their drawers seal tightly and moisture gets trapped.

Don't try to mask the smell with extra fabric softener or more detergent. That actually feeds the bacteria causing the problem. You need to remove the source first, not cover it up.

Within the First Hour

Once you've had a good look and identified where the smell is strongest, it's time to clean it properly. Most smells in Bolton homes we visit come down to low-temperature washing habits - people running every cycle at 30 or 40 degrees, which doesn't get hot enough to kill bacteria. Modern machines push eco cycles, which is good for energy bills but not always good for drum hygiene.

Here's how to run a proper cleaning cycle:

1. Put a washing machine cleaning tablet - Calgon, Dettol, or Dr Beckmann are all widely available in supermarkets - into the drum itself, not the drawer. Don't put clothes in at the same time.
2. Select the highest temperature your machine offers. 90 degrees if it goes that high. Use the cotton cycle rather than a quick or eco setting.
3. Let it run to completion. Don't cut it short.

While that cycle is running, clean what you can by hand:

• Wipe the door seal thoroughly with a diluted white vinegar solution or a dedicated mould remover spray. Work into every fold of the rubber - this is exactly where mould hides. LG and Samsung door seals tend to have deeper folds than some other brands, so take your time.
• Soak the detergent drawer in hot water for 20 minutes, then scrub off any residue with an old toothbrush. Pay attention to the underside and the back section where water pools.
• Rinse the filter under the tap and pick out any trapped debris. Coins, hair, bits of tissue, and lint are common finds. These block drainage and create the conditions bacteria love.

If the smell is specifically eggy or sulphurous rather than musty, make a note of that. It points to a different problem - stagnant water in the pump or drain - and is worth mentioning when you speak to an engineer.

Same Day

Once the cleaning cycle has finished, check whether the smell has cleared. If it's significantly reduced, run a second cleaning cycle. If it's completely gone, that's the result you want - but keep monitoring over the following days, as the smell can return if the underlying habit hasn't changed.

If the smell is still clearly there after two cleaning cycles, or if it's a strong eggy, sewage-type, or burning odour, it's time to call an engineer. In Bolton and across Greater Manchester, the underlying causes we commonly see that cleaning won't fix include:

• A deteriorated door seal where mould has worked deeper into the rubber than surface cleaning can reach. The seal needs replacing rather than cleaning.
• A blocked or failing drain pump leaving stagnant water inside the machine after every cycle.
• A partial blockage in the drain hose, often caused by a build-up of lint and detergent residue over years of use.
• A faulty heating element, meaning the machine isn't actually reaching the temperature you're selecting - so even a 60-degree wash is running cold.

When you ring to book a visit, tell the engineer what the smell is like, whether it's constant or only appears after a cycle, how old the machine is, and what temperatures you typically wash at. This information helps them bring the right parts and saves time on the day.

A diagnostic visit from an appliance repair engineer in Bolton typically costs between 40 and 80 pounds, with that charge usually deducted from the repair cost if you go ahead with the work.

The Repair Visit

Most diagnostic visits take between 30 and 60 minutes. The engineer will run the machine through a test cycle, inspect the filter and pump, check the door seal condition, and pull error codes from the machine's onboard system where supported. Voltrade's GoFIX diagnostic tool can access fault codes on most modern machines from Bosch, Hotpoint, Samsung, LG, and Beko, which speeds the process up considerably and removes a lot of the guesswork.

Common repairs and what they typically cost in 2026:

• Door seal replacement: 80 to 150 pounds including parts and labour
• Drain pump replacement: 100 to 180 pounds
• Drum bearing replacement: 150 to 250 pounds (a bigger, more time-intensive job)
• Heating element replacement: 90 to 160 pounds

Whether a repair makes sense financially depends on the machine's age and condition. A ten-year-old budget machine with a failed bearing often isn't worth the money to fix - a new mid-range model will cost less than the repair and come with a manufacturer's warranty. Our engineers give you a straight answer on this rather than pushing you towards a repair that doesn't stack up.

For seal or pump replacements, the engineer can often carry out the work the same day if they have the part in the van. Bosch and Hotpoint parts are generally easy to source quickly. Samsung parts can sometimes take a day or two to arrive depending on the specific model.

The Following Week

Once the machine has been repaired or given a thorough clean, use the first week to confirm the smell is gone and to build a couple of new habits.

After each wash:

1. Leave the door ajar for at least an hour. This lets the drum dry out properly and stops mould from re-forming in the seal. It's a simple habit but it makes a real difference, particularly in homes with limited ventilation - which is common in older terraced properties across Bolton.
2. Wipe the door seal dry with a cloth. It takes under a minute and significantly reduces moisture build-up.
3. Leave the detergent drawer slightly open too, so air can circulate.

After three or four washes, take stock. If the smell has not returned, you're on the right track. If it's creeping back, contact the engineer again - sometimes a persistent smell points to a second issue that was masked by the first, such as a slow external drain affecting the machine's ability to clear water fully.

Long Term

The single most effective long-term fix is washing hot occasionally. You don't need to boil every load - but running a 60-degree cycle once a week, or a monthly 90-degree maintenance wash with no clothes and a cleaning tablet, keeps bacterial growth in check. Our engineers recommend this to virtually every household they visit across Greater Manchester, regardless of machine brand.

Other habits worth building in:

• Use the correct amount of detergent. More does not mean cleaner clothes. Excess detergent leaves a residue inside the drum that bacteria feeds on. Most people use too much, particularly with concentrated liquid detergents. Check the dosage guidance on the packaging.
• Try powder detergent occasionally. Liquid and gel formats are more likely to leave residue than powder, especially in machines that run a lot of cool cycles.
• Cut back on fabric softener. It coats the drum and seal and is one of the most consistent causes of long-term odour build-up we see. If you prefer to use it, use less than the recommended dose.
• Run your machine's built-in drum clean cycle every one to three months. Most modern Bosch and Samsung machines have a dedicated programme for this - check the manual if you haven't used it before.
• Clean the filter every two to three months as a matter of routine, not just when there's a problem.

Water hardness varies across Greater Manchester, and in some areas limescale contributes to washing machine deterioration over time. A monthly limescale treatment tablet is a low-cost way to protect the drum, heating element, and pump.

If your machine is over eight to ten years old and keeps developing odour problems despite regular maintenance, it may be reaching the natural end of its serviceable life. Older drum seals and internal components reach a point where smell problems become difficult to resolve permanently, and the cost of ongoing repairs starts to outweigh the value of the machine. Our engineers in Bolton encounter this regularly with older budget-range appliances - sometimes the most practical advice is to budget for a replacement.

Timeline Questions

How long does a washing machine cleaning cycle take?

A full 90-degree cotton cycle typically takes between two and three hours, depending on the machine. Bosch and LG machines tend to run longer at high temperatures than some budget brands. You can't speed this up - the full duration is needed for the cleaning tablet to work effectively. Don't interrupt the cycle part-way through, as this can leave residue in the drum and won't deliver the full cleaning effect.

Why does my washing machine smell like rotten eggs?

An eggy or sulphur smell is typically caused by bacteria in stagnant water that's trapped in the drum, pump, or drain hose. It's different from the musty mould smell most people notice first. If a hot cleaning cycle doesn't clear it, the drain pump or drain hose is commonly the cause and needs checking by an engineer. A persistent sewage-type smell can also suggest an issue with the external drain connection rather than the machine itself.

Is it worth repairing a smelly washing machine or better to replace it?

It depends on the machine's age and what's actually causing the smell. A seal or pump replacement on a machine under six or seven years old is usually worth doing. If the machine is over ten years old and the drum, bearings, or motor are involved, replacement is often the more sensible option. A Bolton-based engineer can give you a clear assessment after a diagnostic visit, which typically costs between 40 and 80 pounds.

Can I use bleach to clean my washing machine drum?

You can, but it's not the best choice for regular use. A small amount of bleach in an empty hot cycle will kill bacteria effectively, but bleach degrades rubber door seals over time with repeated use. Dedicated washing machine cleaning tablets or citric acid-based treatments are safer for monthly maintenance. If you do use bleach, don't mix it with any other product, and run an empty rinse cycle afterwards before you wash any clothes.