I had my first blowout in my first batch in the ferm chamber. After cleaning it out thoroughly, I sprayed a bit of star5san to kill any nasties and made the mistake of leaving ther starsan in the bottom. Started growing mold on the outside of the fermenter. Now I always make sure the ferm chamber is perfectly dry, and I have a hand towel that I put in the hanging basket after its super dry from the dryer. I feel it occasionally and, if it does not feel super dry, I throw it back in the dryer. The only thing I've needed to do is periodically wipe moisture from the rubber seals on the freezer lid. When I don't have a batch fermenting, I make a habit of leaving the lid open. No smells, but the inside is lined with sheet aluminum, not plastic so I'm not sure if that's why.