My own collection is kept in a crisp, dry environment. A few times though I have bought and received modules in this condition (not from anyone on these boards though).
I am wondering, if it is moisture

, should i bag and board them straight away or put them by the heating vent

first so that I do not trap moisture in the probag (if it is moisture - they do seem dry).
If I put them under heavy books

, will they resume their former shape or are they forever warped

!