Condensation inside trailer.

I'll try the roof vent in the bedroom next time. Some engineer that designed my toy hauler decided it would be a great idea to put a roof vent over the bed in the back but the trouble here is I never put the bed down as its not needed and if I did I would still have to climb the ladder to reach the vent. Guess they figured no one would be able to reach the roof vent standing on the floor due to the high ceiling of the toy hauler but I guess they never met a tall guy with long arms.

I just hate to let any heat out when I am running off battery's and using the heater as little as possible but all the moisture can't be good for the walls.