Washer has a persistent bad odour inside the drum

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.