At the time, I tried a couple of different suggestions for ridding the funky smell -- wiping the interior & rubber seal down, keeping the door open between loads, draining the machine frequently from the bottom corner filter, adding a specific washing machine product that "washes" your machine, etc.... Ultimately, I found that using Vinegar every few weeks in the detergent dispenser and running the machine empty, on the hot cycle, made the overall difference.
But, a year has gone by, and the smell tends to creep around.... In an effort to take a new line of defense, I've started adding a fabric softener to every load and that seems to be helping. I use ECOVER products for most of my other cleaning needs, so I've been using their Sunny Day scent fabric softener.
All this aside, I have been reading (check out Pretty Handy Girl's post & comments) that one