This is exactly why all heating sources should be controlled with a thermostat, which I assume the OP already has. No lamps or UTH's should be used without one.
I completley agree, we had a helix
1.1 Spider BP, 2.1 Pastel BP, 0.1 Albino BP, 1.0 Mojave BP, 5.17 Normal BP, .004 Het Pastel (just hatched, havnt sexed yet), 1.0 Western Hognose, 1.0 Dumeral Boa, 0.1 Red Golden Bearded Dragon, 1.0 Maltese Poodle, 0.1 Short Haired Domestic Cat, .001 Lineolated Parakeet, 1.0 Teddy Bear Hamster