T.H.
My son had that problem when ever he stayed the night at my parents. Then while I was talking to my mom about it she brought up a good point to me. She said "Well, just look at how much padding he is sleeping on. It isn't very much and after awhile it gets very uncomfortable." So we put a thin layer of eggs crates down before we put the fitted sheet on the pay pin bedding and it worked like a charm. He slept well through out the night and we was able to get another six months use out of the play pin.