I know, I wasn't relying on the UTH to keep the ambient temps up. The heat pad is actually on the cool side, because that's where he usually is. I sometimes catch him on the hot side, but then he goes to the cool side right after. The surface temp was around 90 degrees last time I checked, I used a probe to measure it.
Are temp guns/IR thermometers and gram scales very expensive? I really don't have much money to go and buy a whole bunch of other things like that, I've already spent tons of money on what I have for him now.