Ah, alright. I'll try to move it. The instructions for it says that it's preferred to be on the side, rather than underneath, so I thought it would work just as well, but when I came home from work last night he was just curled up against the side with the heat mat, so I think the rest of the tank is too cold for him.
Can I take the pad off and it's still sticky to put it somewhere else? Also, should I get a heat lamp? I know ball pythons prefer belly heat since they hide a lot and are noctournal, but would a ceramic heat bulb be good for the hot side?