Hi again. I think your overheating her. You need to be measuring the temps above your UTH. Your ball can come in direct contact with it and it is likely dangerously hot. Those stick on things are useless garbage. It is important to use a probe thermometer or a temp gun. For a basic setup id suggest the one hide over the UTH at a temp roughly around 90-92. The other cooler side should be around 80 on the subtrate. Have a probe thermometer on each side. The thermostat should regulate the UTH. Hope this helps, GL