Gram Biofilm and Detergent Residue Build-up

Washer has a persistent bad odor inside the drum

Possible Causes

Frequent low-temperature washes, excess detergent use, standing water in door seal folds, clogged drain pump filter

User cleaning routine:

Drum clean cycle: Run a maintenance wash at 90–95°C with no laundry, using a washing machine cleaner or a cup of white vinegar (if permitted by Gram manual).
Clean door seal: Wipe the gasket folds with a cloth and mild detergent. Remove any trapped lint or debris.
Clean pump filter: Remove and clean the drain pump filter to eliminate trapped organic matter.
Leave door ajar: After each wash, leave the door and detergent drawer slightly open to allow drying and prevent mould.

Very Easy 1/5