I have the same issue with only cold rinse on my washer. I don't have AIO's but I do have inserts that get FUNKY after awhile. I break the rules and bleach soak the inserts in a bucket every few months, and then rinse them and rinse them (first by hand and then multiple times in the washer). That's the only way I've kept the funk at bay.
3/5/12 at 6:56pm