I have a SONY HD video camera and a Seatool Housing. About 30 minutes in to a dive the lense port starts fogging up. In another 15 minutes it is completely fogged and the camera cannot auto focus. I have tried keeping the housing closed in air conditioning when not in use. I have tried keeping the housing closed at room temp when not in use. I have tried keeping the housing open when not in use. I put a moisture muncher (silica gel) in the housing each day when I change batteries. I need some new ideas for solutions!