It took me an embarrassingly long time to accept that the appliance I use to clean things needed cleaning itself. The clue was the towels: washed on a Sunday, folded warm, and by Wednesday they had that faint cellar smell. I tried more detergent, then a different detergent, then blamed the drying rack. The actual culprit was a rubber seal I had never once looked behind in three years of living in that flat.
Washing machines accumulate a specific kind of grime — a mix of detergent residue, fabric softener film, body oils, lint and hard-water scale. In a warm, permanently damp drum, that mixture becomes a home for bacteria and mould, and everything you wash picks up the smell. The good news: the reset takes about twenty minutes of actual attention, once a month.
Start with the parts you can see and reach
Pull out the detergent drawer completely — most slide out with a firm tug or a small release catch — and soak it in hot water in the sink. The sludge that comes off it is usually the first shock. Scrub the compartments and the underside of the softener insert with an old toothbrush, and don't forget the cavity the drawer sits in; a damp cloth wrapped around a wooden spoon handle reaches the back of it.
Then the door seal, if you have a front loader. Fold the rubber gasket back gently and wipe all the way around with a cloth dipped in hot soapy water, working into the fold at the bottom where water pools. Expect hair, coins, grit and grey slime. This is the single highest-impact five minutes in the whole job. On a top loader, wipe the rim, the underside of the lid and around the agitator base instead.
Don't skip the filter — it's where the smell lives
Most front-loading machines have a small drain pump filter behind a panel at the bottom front. Put down a towel and a shallow dish first, because water will come out. Unscrew the cap, let the water drain, remove the filter and rinse the trapped lint, buttons and hairgrips away under the tap. Check your machine's manual if you can't find it — the location varies, and a few models are accessed differently.
Doing this every month or two prevents slow draining, which is what leaves standing water in the machine between washes and turns the whole drum sour. It also frequently reunites you with the missing half of a favourite pair of socks.
Then run the machine empty and hot
With the parts clean, run a long, empty cycle at the highest temperature your machine offers — many have a dedicated drum clean or tub clean setting. Heat is what breaks down the greasy detergent film that cooler eco cycles leave behind. For scale in hard-water areas, citric acid or a proprietary descaler works well. A cup of white vinegar is the classic kitchen alternative; used occasionally it's fine, but I wouldn't make it a monthly habit, because acid over time is unkind to rubber seals and hoses. Never combine bleach and vinegar in the same cycle — mixing them is genuinely unsafe.
Afterwards, wipe the drum and glass dry, and leave the door and the detergent drawer slightly open so air circulates. That one habit alone prevents most future smells.
How often should I clean my washing machine?
A full reset — drawer, seal, filter and hot empty cycle — once a month suits most households, and every six weeks is fine if you wash rarely and mostly at higher temperatures. If you wash a lot at 30 degrees, use fabric softener, or live somewhere with very hard water, stay monthly. Between resets, the two-minute version is simply wiping the seal dry and leaving the door ajar.
Why does my laundry still smell musty after washing?
The most common causes are a dirty seal or filter, too much detergent leaving a film that traps odour, and clothes left sitting damp in the drum after the cycle ends. Work through those in order: do the reset above, cut your detergent dose slightly, and hang washing within an hour of the beep. If the smell persists after a clean machine and a hot wash, check that the drain hose isn't kinked or pushed too far down the standpipe, which can let waste water sit back in the system.
