i know this sounds silly, but is it ok for a day or two to use towels for substrate? i just got my little one yesterday, and had put the expandy dirt stuff in there before i got him(also my adults cage) and it's late in the afternoon and not dry. it's still real moist in both cages. so i took it out(worried about them getting cold). i put down nice soft towels instead until the stuff dries. at the rate it's going it may be a couple of days. i just don't want to stress the little one out.