[ndr42]

We had bad smell with just drying all reachable areas and leaving open the door, cleaning everything that is easy disassembled (tubes, water outlet area of the pump) from tine to time.

2 months ago we discovered the boil wash. With some detergent containing bleach it stopped the smell, even if we leave the machine closed during the day.

I our case it's not we have forgotten but never discovered this function.