What do you all put in a bp enclousure for them to rub against to help them shed? I recently got two more BPs making it a total of 3. With the first one i had a hide from petco that is kind of rough and it works fine ti help him start the shed. The problem is it was like $17 and i plan on getting more snakes and dont really want to spend that much on every snake. What do you put in there to help them shed?