Normally I've only been able to keep it at 65 - 70 on the cool side and 80 or so on the hot side. I moved Kleo's favorite hide to the middle so at least she is getting enough heat for now (she has never refused a meal and always feels warm or room temp to the touch, not cold). She never even lays directly on the UTH since I did that, so I think she's safe from burns for now. But that's the biggest reason I looked into upgrading her enclosure with more space and a larger heat pad.
The only thermostat PetCo carried was a Zilla one for $53 e.X;;; I just hope it works well! I kept the receipt just in case. Got a medium sized Zilla UTH to go with it.
If anything I know I'm at least doing better than PetCo...their BP tank had the humidity on the 'desert' range as usual, and one of the poor dears already had a sunken eye. Reptiles always seem to be the least of everyone's priority in most pet stores, it infuriates me.