Not a mold issue but recently I had a mouse problem on the patio- 3 in 2 days. With the summer rains they were heading for high ground. Well, I tracked them to the smoker; came up through the drain hole and set up housekeeping. I used easy off and stripped off the seasoning and other evidence of bbq right down to bare stainless. Wiped out the heavy stuff then rinsed it with a hose and sponged it. Dried it with paper towels, and then let it air out for a few hours. The inside looked new again. Added wood and fired it up to re-season. No harm done.