Are you actually measuring the temperature of the hot spot on the floor? If not you definitely should be. Those UTHs can get WAY too hot. Is your BP hanging out on the hot side at all? An unregulated hot spot could be a part of your problem. You should really have a thermostat to control that (you can get a cheaper on/off kind for ~$30), and failing that, at least a lamp dimmer and thermometer with probe (but you will be in there several times a day adjusting it if the room temps aren't extremely stable). If you do not have a thermometer on the hot spot, or any kind of regulation, unplug it until you do, your BP will be better off with too little heat, than too much.
i have a strip thermom about 4" above the UTH and the snake doesnt seem to mind, she is there alot, in fact she is there right now