Stick the probe right on the UTH and leave it there. This is your hot side temp.
110 is waaay to hot. If you can't afford to buy a thermostat, then get a $10 light dimmer from the home depot until you can get a proper thermostat. She shouldn't be cold with those temps. But if she is burrowing, then for sure get that dimmer right away. 110 can cook your snake. If you haven't fed her recently, I would just turn it off and leave the heat light on.