Please pay attention to the caresheets. Your hotspot is too hot, your low temps are too low, and the humidity is too low. Get the snake into a tub for now, as tanks are horrible for humidity with these guys. It is probably easier just to keep the entire tub around 78-83 degrees, no hotspot. Paper towel substrate is fine if the humidity is high enough on its own. Get the snake into a tub and find out.