How to Clean a Smelly Washing Machine (Front & Top Load)
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To clean a smelly washing machine, run an empty hot cycle with a cleaner tablet, then wipe the rubber gasket, detergent drawer, and filter — and leave the door open afterward so moisture can't breed mildew. That musty, "wet dog" smell comes from biofilm and trapped moisture, not from the clothes. The good news: a 30-minute cycle plus a quick wipe usually fixes it. Here's the exact process for both front- and top-loaders.
Why Your Washer Smells
Detergent, fabric softener, body oils, and lint coat the inside of the drum and especially the front-loader gasket. In a closed, damp machine that film ferments into a sour smell that then lands on your "clean" laundry. The cure is to strip the residue and dry things out.
Step-by-Step Fix
- Add a cleaner tablet. Drop a washing machine cleaner tablet into the empty drum.
- Run the hottest, longest cycle. Heat dissolves the biofilm; an empty cycle keeps it from redepositing on clothes.
- Wipe the gasket (front-loaders). Pull back the rubber seal and clean the hidden folds with a cloth.
- Rinse the drawer and filter. Remove the detergent drawer; rinse the lint/pump filter if accessible.
- Leave it open. Crack the door and drawer so everything air-dries.
Fix Washer Cleaner Tablets
The standard 24+1 pack handles regular households; pet homes should use the Pet Owner 25-tablet pack for extra odor and hair control. Shop laundry →
Front-Load vs Top-Load
| Front-load | Top-load | |
|---|---|---|
| Main culprit | Gasket biofilm | Drum rim & dispenser |
| Key step | Wipe seal folds | Clean rim & agitator |
| Prevention | Door ajar always | Lid up, drawer open |
Prevent It Coming Back
- Use the right detergent amount. Too much = more residue.
- Air-dry between loads. The #1 mildew preventer.
- Monthly tablet cycle. Stays ahead of buildup.
- Pet homes: the pet-owner pack + an extra rinse.
Frequently Asked Questions
Why does my washing machine smell like mildew?
Moisture trapped in the gasket and residue buildup ferment into that smell. A hot tablet cycle plus a gasket wipe and an open door fixes it.
Can I clean a washer with vinegar instead of tablets?
Vinegar helps with light odors, but a dedicated cleaner tablet is more effective at dissolving biofilm. For best results, use tablets monthly.
How do I clean a front-load washer gasket?
Pull the rubber seal open and wipe the hidden folds with a cloth and mild cleaner; rinse and dry. Do this monthly to stop odor at the source.
Are washer tablets safe for septic systems?
Plant-based tablets are formulated to be septic-safe. Keep them stored away from children and pets.
Why does my laundry smell after washing?
The machine is the likely culprit — a smelly drum transfers odor to clean clothes. Clean the washer first, then consider a scent booster.
How often should I clean a smelly washer?
Immediately when you notice odor, then monthly as maintenance. Pet households may need every 2–3 weeks.
Kill the Musty Smell
One tablet cycle and a quick wipe bring your washer — and laundry — back to fresh.
Shop Laundry Care →