I'm usually using removable adhesive putty to fix stuff on the wall (mainly plastic I'm writing on). But this time the sticks don't stick on the surface because of a condensation issue (rock issue).
I can't use pins (too hard and would damage the wall: thin layer of plaster on old rocks), I can't drill holes for that (I would need 10+ holes per plastic and the landlord...).
I need to find a cheap and removable solution that would stick on my wet wall.
ps: the question is not about drying a wet wall.