Is your UTH on a thermoSTAT? If not, I would unplug it ASAP until you get one. Commercial UTH's tend to run far too hot and can easily burn your snake if he/she gets too close. A decent, cheap thermostat is the hydrofarm http://www.amazon.com/Hydrofarm-MTPR.../dp/B000NZZG3S and your ideal thermostat would be a herpstat http://spyderrobotics.com/products/herpstat12.html
Best of luck!