How to Clean a Smelly Washing Machine and Keep It Fresh

You pull a load of towels out of the drum, and instead of smelling clean they smell faintly of a damp basement. Wash them again and the smell comes back by evening. In most homes, the towels are not the problem. The washing machine is, and it usually takes about 40 minutes of work to fix it properly.

A smelly washing machine is almost always caused by the same thing: a film of detergent residue, fabric softener and lint that stays wet inside the machine and grows bacteria and mold. The good news is that you can clean it with things already under the sink. The less obvious news is that cleaning alone will not stop it returning unless you change two or three habits as well.

Where the Smell in a Washing Machine Actually Comes From

People tend to wipe the drum and stop there. The drum is rarely the source. The smell usually lives in four places you do not see during a normal wash.

The door seal. On front loaders, the rubber gasket has a deep fold at the bottom that collects water, hair and grey sludge.
The detergent drawer. Softener left in the channels turns into a sticky black layer within a few weeks.
The drain pump filter. A small round cap at the bottom front of most front loaders traps coins, hair ties and standing water.
The outer tub. The space between the drum you see and the tub behind it is where residue builds up thickest.

Top loaders skip the gasket problem but often have a dirty agitator cap and a lip under the rim that never gets rinsed.

How to Clean a Smelly Washing Machine Step by Step

Set aside about 40 minutes of hands on time plus one long hot cycle. Work in this order so the dirt you loosen ends up being rinsed away at the end.

Empty the drain filter. Put a shallow tray and an old towel under the cap, unscrew it slowly and let the water out. Pull out debris and rinse the filter under the tap. Expect half a litre of water or more.
Remove the detergent drawer. Most pull out fully if you press a tab in the softener compartment. Soak it in hot water for ten minutes, then scrub the channels with an old toothbrush. Clean the cavity it slides into as well, which is often worse than the drawer.
Clean the door seal. Pull the fold back gently and wipe it with a cloth dipped in a solution of one part household bleach to ten parts water, or a spray cleaner with bleach. Dry it afterwards.
Run a hot empty cycle. Choose the hottest setting, 60 or 90 degrees, with either a commercial machine cleaner or two cups of white vinegar in the drum. Do not use bleach and vinegar in the same cycle.
Wipe and dry. When the cycle ends, wipe the drum and seal and leave the door open for a few hours.

If grey water sits in the drum after the cycle, the drain hose or filter may still be partly blocked. The same slow water logic applies to sinks, and our guide on unclogging a slow drain without chemicals covers a similar approach.

Vinegar, Baking Soda or a Machine Cleaner

All three appear in cleaning advice, and they do different jobs.

Option	Good for	Weak point	Rough cost per clean
White vinegar	Limescale and light odour	Does little against thick sludge; heavy use may age rubber seals	Under 1 dollar
Baking soda	Mild deodorising, gentle scrub on the seal	Does not kill mold	Under 1 dollar
Diluted bleach	Mould on the gasket and black spots	Can fade coloured clothes left in the drum	About 1 dollar
Commercial drum cleaner	Residue in the outer tub	Costs more and still needs the manual steps	3 to 5 dollars

For a machine that smells strongly, a commercial cleaner or a bleach cycle does more than vinegar. For monthly upkeep, either works.

Why Using Less Detergent Fixes More Than Cleaning Does

The common advice is to clean the machine every month. That helps, but it treats the result rather than the cause. Most smelly washing machines have been overdosed with detergent for years.

Modern high efficiency machines use far less water than older ones. Pour in a full cap of liquid detergent and a lot of it never rinses out. It coats the tub and becomes food for bacteria. Try halving your usual dose for a month. Clothes still come out clean in most cases, and the machine stays fresher between cleanings.

Fabric softener is the other big contributor. It is designed to leave a coating, and it leaves one inside the machine as well. Skipping it, or switching to a splash of vinegar in the softener drawer, removes a lot of the sticky buildup that causes the black film.

Daily Habits That Keep the Smell Away

Take wet laundry out within an hour of the cycle finishing.
Leave the door and the detergent drawer slightly open between washes so air can dry the inside.
Run at least one wash a week at 60 degrees. Constant cold washes let residue build up faster.
Wipe the bottom fold of the door seal with a dry cloth after the last load of the day.
Clean the drain filter every two to three months, or monthly if you have pets.

These habits are the same principle that keeps a bathroom fresh. If you have already tackled the shower, our piece on removing mold from shower caulk follows the same moisture rule.

When the Smell Means Something Is Wrong

If a full clean does not help, look further. A smell like sewage often points to a drain hose pushed too far into the standpipe, which lets waste water siphon back. The hose should go in only about 15 centimeters. A burning or electrical smell is different altogether: switch the machine off at the wall and call a technician. And if water pools under the machine, check the door seal for tears before blaming the filter.

Frequently Asked Questions

How often should I clean my washing machine?

A quick clean of the drawer and seal once a month is enough for most households, with a deeper clean including the filter every two or three months. Large families and homes with pets may need to clean the filter more often.

Can I clean a washing machine with clothes inside?

No. Bleach or a strong cleaner can damage fabric, and clothes block the water from reaching the outer tub. Always run the cleaning cycle with an empty drum.

Why do my towels still smell after cleaning the machine?

Towels can hold residue from earlier washes. Run them once at 60 degrees with half the usual detergent and no softener, then dry them fully within a few hours. The smell should go after one or two washes.

The Simple Fix to Remember

Clean the four hidden spots once, run a hot empty cycle, then cut your detergent in half and leave the door open. Most smelly washing machines stay fixed with those changes alone. For more practical fixes around the house, browse our home section.