Don't forget that condensation is a product of humidity AND temps! If you room is cool you will get condensation until the room and tub have the same humidity. If my room hit 66-7º and the tubs are at 50-60% I have condensation. If the room temps lift some it goes away. Condensing water from air takes a cool to warm temps. Think about a glass in the freezer it goes in clear come out clear and frosts up in a warm room.