[Brian] They are a couple easy ways to combat this problem. First the main question I have is do you live in it? The burning of propane creates moisture in the air. So the heavy users I can only suggest some Air dryer that can be found in most RV dealers. If this is purely a recreatinal vechicle then I would suggest Dri-z-air crystals. This should help if you have any further questions contact me at email@example.com. I can help in anyway possible.