What Sauzo said! I use paper towels and i've always been opposed to using substrates for many different reasons, but due to the fact that i'm growing extremely tired of battling humidity during the winter months in my dry old house, i'm starting to consider substrate. Reptile Prime would be my first choice, but the shipping cost would make it cost waaay too much for me to have 15 - 20 snakes on this stuff!