A washing machine should make your clothes smell clean. When it starts to smell musty, sour, or like a damp towel, the machine itself is usually the problem — not your laundry detergent. Most washer smells come from a few familiar places, and one deep clean plus two small habits usually fix them.
Quick Overview
- What it is: A full clean of the parts where smell builds up — the door seal, the filter, the detergent drawer, and the drum.
- Time needed: About 30 minutes for the deep clean, then 2 minutes after each wash.
- What you need: White vinegar, baking soda, an old toothbrush, a towel, a shallow bowl, and rubber gloves.
- Best for: Front loaders and top loaders that smell musty, sour, or damp even after a wash.
Why Your Washing Machine Smells
Modern machines use less water and wash at lower temperatures. That saves energy, but it leaves more residue behind: a thin film of detergent, softener, body oils, and lint builds up in warm, damp places, and mould and bacteria grow in that film. That is what you smell. The worst spots stay wet between washes: the door seal, the detergent drawer, the drain filter, and the outer drum you never see.
Before You Start: Safety First
- Unplug the machine before you touch the filter or any internal part.
- Never mix vinegar and bleach, and never mix bleach with other cleaners. Use one cleaning method at a time.
- Check your machine’s manual before using vinegar on a rubber seal every week — an occasional cleaning wash is fine for most machines, but daily vinegar is not needed and can wear seals over time.
- If your machine is leaking, making grinding noises, or showing an error code, stop and call a repair service instead of cleaning around the problem.
The Deep Clean, Step by Step
Work in this order — each step removes a different source of smell.
Step 1: Clean the door seal (front loaders)
Pull the rubber seal open gently and look inside the folds. This is where grey slime and black spots hide. Wipe the whole seal with a cloth dampened with warm water and a small amount of dish soap. Use an old toothbrush for the folds. Rinse with a clean damp cloth and dry the seal with a towel. Leave the door open for an hour so the seal dries fully.
For a top loader, wipe the rim under the lid and around the top of the drum in the same way.
Step 2: Clean the detergent drawer
Pull the drawer out — most drawers have a small tab you press to release them. Rinse it under warm water and scrub the compartments with the toothbrush. Look inside the empty drawer slot too, and wipe it down. Softener compartments are a common smell source because softener leaves a sticky film. Let the drawer dry before you slide it back in.
Step 3: Clean the drain filter
The filter is usually behind a small flap at the bottom front of a front loader. Put a towel and a shallow bowl under it first, because water will come out. Unscrew the filter slowly, pull out lint, coins, hair ties, and any other trapped items, and rinse the filter under warm water. Wipe the filter housing with a damp cloth, then screw the filter back in firmly. For a top loader, check the lint filter or the agitator cap area described in your manual.
Step 4: Run a cleaning wash
With the drum empty, add two cups of white vinegar to the detergent dispenser and run the hottest, longest cycle your machine offers — often called a tub clean, maintenance, or 90-degree cotton cycle. When that finishes, add half a cup of baking soda directly to the drum and run a second hot cycle. Wipe the drum and seal dry when it finishes.
Step 5: Wipe the outside and leave it to dry
Wipe the door, the lid, and the control panel with a damp cloth. Then leave the door or lid open for a few hours. A machine that dries between washes smells far less than one that stays sealed shut.
Front Loader vs Top Loader
Front loaders smell most from the rubber seal, so keep the door slightly open between washes. Top loaders smell more from the lid rim and detergent build-up, but they still need the same cleaning wash and filter check.
The 3 Habits That Stop the Smell Coming Back
- Leave the door open. After every wash, leave the door or lid ajar until the drum is dry. This single habit prevents most smells.
- Use less detergent. Most people use too much. Follow the dose on the bottle for your load size and water hardness, and skip fabric softener if you can — it leaves the film that feeds the smell.
- Run a hot cleaning wash monthly. Put it in your calendar. One empty hot cycle a month, with vinegar or a washing-machine cleaner, keeps residue from building up again.
Mistakes That Make It Worse
- Adding more detergent to cover the smell. Extra detergent adds more residue, which feeds the smell.
- Closing the door straight after a wash. A sealed, damp drum is the perfect place for mould to grow.
- Ignoring the filter. A blocked filter traps dirty water and lint. Clean it every two to three months, or monthly if you wash pet bedding.
When to Call a Repair Service
Call a professional if the smell stays after a full deep clean, if you see water leaking from the machine, if the drum does not drain, or if the machine smells like burning or chemicals rather than damp laundry. A persistent smell after cleaning can point to a blocked drain hose or a pump problem, and those are not DIY fixes.
Quick Checklist
- Wipe the door seal and dry it.
- Scrub and rinse the detergent drawer.
- Empty and rinse the drain filter.
- Run a hot vinegar cycle, then a hot baking-soda cycle.
- Leave the door open until the drum is dry.
- Use the right detergent dose and run a cleaning wash every month.