Has anyone used one of the air dryers sold at WM and other marine stores for preventing mold and mildew in the cabin? They are supposed to heat the cabin air above the dew point to reduce humidity and prevent mold. <br /><br />Do the systems on the market work well? I notice that they cover either 500 or 1000 cubic feet which seems like a rather small area. Would a more powerful one be better?<br /><br />Thanks for any help you can provide.