How do I clean the drum on the WAW285H1?
Use the dedicated Drum Clean program, which is listed in the program selection table and runs with an empty drum at Extra Hot temperature. This special cycle is designed specifically for cleaning the drum. It is recommended to run this cycle before your first load of laundry and periodically as part of ongoing maintenance.
From the official Bosch WAW285H1 EcoSilence Front Load Washer manual, page 33
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