De Dietrich Biofilm and Detergent Residue Build-Up

Persistent bad odor from drum and laundry, even after washing

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Possible Causes

Frequent low-temperature washes, Excess detergent use, Standing water in sump and hoses, Mold growth on door seal and drum

How to Fix / Troubleshooting

Safety: Ensure good ventilation in the laundry area when using cleaning agents.

  • 1. Run maintenance wash: Run an empty 90°C cotton cycle with a washing machine cleaner or a cup of white vinegar (check manual for compatibility) to dissolve residues.
  • 2. Clean door seal: Wipe the bellows, especially the folds, with a mild bleach solution or dedicated cleaner to remove mold. Rinse thoroughly.
  • 3. Clean detergent drawer: Remove the drawer and scrub away deposits. Clean the housing and rinse.
  • 4. Improve habits: Use the correct amount of detergent, run occasional hot washes, and leave the door and drawer slightly open between uses to dry out the interior.

Note: Severe mold on the seal may require replacing the door gasket.

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Repair Difficulty

Very Easy 1/5

Required Part

Door Seal (Bellows)
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