Thanks for the comments, Peccavi.
I agree..... getting into the drum would be a last resort. I like the idea of finding a filter to clean, but there's no mention of one in my owner-manual, and I can't see an access point low down at the front.
I don't think it's the outlet pipe. If it were, the whole kitchen would smell.
If we take the clothes out soon after the wash completes, they smell ok, but they do hum if left in too long.
michaelcarts, October 2008