I recently bought a 2nd-hand Bosch WFF 1201 and the machine washes just fine. However, a nasty sulphurous smell is coming from the drum. I did some research and discovered this is due to a build-up of slime and gunk caused by the machine being used primarily for cool washes. I checked behind the rubber seal, behind the door, and there's a nasty build-up of thick slime. It's not making my clothes smell bad but the idea of washing my clothes in there is pretty unpleasant. Put simply, is there a way to clean the machine?
Last night I ran a 90 degree hot-wash with no clothes in the drum and only using non-biological powder and a liberal squeeze of liquid-bleach. This got rid of some - but not all - of the smell but has done little, if anything, to remove the slime. I'm presently running the same process again.