The ice box doesn't drain and isn't the problem. I've used "strike Bag" which is a disinfectant that the hospitals use which kills almost everything. I mixed it up and sprayed everywhere in the cabin bilge and lockers using a garden sprayer. It's seemed to help but I still don't have a fresh ventilated smell. I had surgery on my foot and as soon as I can get around I'm going to finish the rest of the boat. I'll try anything suggested here that makes sense then. Thanks.