I'm always cleaning out the enclosure, I never leave any defecated areas sitting in the enclosure. In fact, the Cypress even dries out and there is little moisture in it so I have to mist it a few times a day. I think the Aspen would be much better, actually. A lot softer on my snake's belly than the Cypress. The Cypress also have a lot of shards and sharp/rough pieces so I think that's what causing this to happen. She did just fine on Aspen too, and my other BP seems to like it. Right when I put him in the enclosure he was smelling around and climbing everywhere. Now he's just hanging out in his hide.