Little Swan Biofilm and Detergent Residue Buildup

Washer has a strong moldy or sewer-like odor inside the drum.

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Possible Causes

Frequent cold washes, Excess detergent use, Door kept closed between cycles, Clogged drain trap retaining dirty water

How to Fix / Troubleshooting

Safety first: Use gloves and eye protection when handling cleaning chemicals.

  • Run a drum clean cycle: Use the built-in tub clean program if available, with a washing machine cleaner or 1–2 cups of white vinegar (no laundry inside).
  • Clean door gasket: Wipe the gasket folds with a cloth soaked in mild bleach solution. Remove lint, hair, and residue.
  • Clean pump filter: Open the lower access door, remove the filter, and clean out trapped debris that can cause odors.
  • Improve ventilation: Leave the door and detergent drawer slightly open between washes to allow the interior to dry.
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Repair Difficulty

Very Easy 1/5
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