Muchos apologias if someone else has already said this (but can't read all six pages - in lunch hour at work!!) but after I was moaning about my smelly machine, a colleague of mine suggested I get a big bottle of Milton sterilising fluid (or you can get a cheapy version in Savers) the stuff that you use for sterilising baby bottles, and pour the whole lot into all the drawers and slosh the rest around the drum. Put on a hot, hot wash, and voila! Fragrant smelling machine, and problem solved (well, for me anyway, my machine was really smelling of old drains, and it was revolting. I had also tried bleach, vinegar etc.)
Hope this helps.
P x