Is it level? If not level, then the drain may not be the lowest point.
Also, have your removed the drain mesh trap and cleaned it? It's quite a
fine sieve and debris will clog the small holes on a regular basis, so they
need cleaned.. We've been happy with ours.

and that was not a permanent fix for it either. I noticed that there is
always a small puddle of water in the bottom of the machine.
Do any of you have this stink problem with your Bosch's too, and if so how
did you cure it?
Thanks for your help.