Ok! I have been using paper towels to line my tank with. I like using em, but I'm scared to use the PAM with them for some reason. Also, I have to change them once a week and Idk if that means I need to spray with PAM more often? I tried using the repti bark(i think thats what its called, its the stuff you get at petsmart), but even if I layer it really thin, my warm side is still too low. I can't raise my thermostat any higher b/c that would put my glass over 100 degrees and I dont want it that hot incase he tries to burry under the substrate. What is another good form of substrate I can try that might eliminate this heat problem?