You can buy cypress mulch at your local pet store that is intended to be used with reptiles. I use to pull my hair out going crazy trying to keep humidity up for my bp's until I finally broke down and bought a console humidifier. Now I just set the humidifier at 60% and my reptile room stays at a constant 57%-63% humidity. All my snakes have perfect a shed every time and I don't have to worry about my bp's getting an R.I. from incorrect humidity levels. I would recommend a humidifier to anybody who keeps bp's.