Agreed...Damp Rid will take care of the problem. I get it at Home Depot and for some reason it is on one of the paint aisles in my store...maybe all stores. It comes in lots of configs: you can buy ready to use bags that have a hanger or you can buy small non-hanging bags or buckets of the stuff. We hang one in our laundry room and I keep a very large bucket inside my boat.
You can also get an Eva-dry E-500. I've heard good things about these (the E-500, not the smaller one). Unlike the Damp Rid, it is also reusable.