It's hard to keep a boat's interior dry when you're not using it frequently and allowing full exchange of cabin air. Solar vents and other expensive products can help but may not provide a full solution - especially when the boat is covered during the offseason. Awhile back I learned the trick of using calcium chloride, purchased in bulk, to lower moisture levels during the offseason and prevent the growth of mold and mildew. The same chemical is the basis for DampRid, a commercial product that can help considerably both in and out of season. Learn more.
