When clean laundry picks up a musty smell, the machine deserves a closer look. Detergent, softener, lint, soil, and leftover moisture can collect in places a normal wash does not rinse clean: the drum, door gasket, dispenser, filter area, and drain path. A washer-cleaning cycle can help with ordinary residue, but a sewage smell, standing water, or drainage fault needs a different fix.
Follow the smell before choosing the fix
A stale or musty odor strongest at the drum or rubber gasket often points to moisture and residue. Sour laundry can also come from clothes left wet after the cycle. A sulfur or sewer-like smell near the standpipe, slow draining, repeated error codes, or water left in the drum can point to plumbing, a blocked filter, or a service issue. Cleaning tablets should not be used to cover a mechanical problem.
Check the washer’s owner manual before opening filters, removing dispenser parts, or selecting a cleaning cycle. Machine designs differ. Some models have a dedicated Clean Washer cycle; others specify a particular empty hot cycle. The appliance manual and the cleaner package together define the safe routine.
What you need
- The washer owner manual and the cleaner package
- Washing Machine Cleaner for a compatible empty-machine cycle
- A clean cloth for the gasket, door, and dispenser area
- Gloves if the label directs
- Enough time for the machine’s full cleaning cycle and drying afterward
The routine
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Empty the machine and inspect the wet zones
Remove every item from the drum. On a front loader, gently pull back the gasket and look for water, lint, small objects, and residue without forcing the rubber. Check the dispenser for visible buildup. On any machine, note standing water or a strong smell coming from the drain connection. If the manual describes a user-serviceable filter, follow that procedure exactly.
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Run the manual-approved cleaning cycle
Place the amount of Washing Machine Cleaner specified by the physical package where it directs. Do not add clothes, detergent, softener, bleach, or another cleaner. Select the machine’s Clean Washer program or the empty cycle specified by its manual. The appliance maker’s instructions always take priority.
Tip: More cleaner is not a shortcut. Use only the amount printed on the package. -
Wipe the places the cycle cannot dry
When the cycle ends, wipe the door, glass, gasket channel, and dispenser surfaces you can safely reach. Use clean water or the method named in the manual, and never disassemble a part that is not described as removable. If residue remains, repeat the wipe with a clean section of cloth rather than adding a different chemical.
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Let the washer dry between loads
Remove laundry promptly. Leave the door or lid open only if the manufacturer recommends it and the open machine will not create a safety risk for children or pets. Keep the dispenser area dry, use the correct detergent type and dose for the machine, and schedule the next empty cleaning based on the appliance manual, your household’s use, and what you observe.
Common mistakes
- Running the tablet with laundry: The cleaning cycle is for the empty machine, not a load of clothes.
- Using extra detergent to make laundry smell cleaner: Too much product can leave more residue. Follow the detergent and machine directions.
- Ignoring a sewer-like smell or standing water: Those signs may need drain, plumbing, filter, or service attention rather than another tablet.
Honest expectation
QUESTIONS.
Why do my towels still smell after I clean the washer?
The odor may be in the fabric, detergent dose, dryer, or plumbing rather than the drum alone. Rewash according to the textile care label and investigate where the smell is strongest.
Should I leave a front-loader door open?
Many manufacturers recommend ventilation between loads, but check your manual and household safety. An open door should never create access for a child or pet.
Can I use a tablet with bleach or vinegar?
No. Do not mix cleaners. Run one label-directed product in an empty machine, and complete any required rinse before considering a different maintenance step.
Keep going
- Reset the under-sink cabinet: separate appliance care from the pile of general cleaners
- Shop odor and buildup specialists: find the washer, dishwasher, or disposal job you actually have
- Understand refill schedules: each eligible single shows its available schedules
