Dormitory on the first floor is very wet. What shall I do?
During the day, use an unused sheet to cover your bed. It is usually sunny. The lower felt / cardboard and the lowest layer of the mattress are OK, which makes the room moist. If you think the answer has solved your problem, please adopt
I used to live there too, often the sun is palliatives, then along a way, first in bed on a layer of plastic cloth (moisture from below), thick layers of cardboard, covered at least two featherbeds on top of sheets to with good air permeability, with the best hair.
