a good thermostat with proper probe placement will correct the heat issue; i would get a cheap thermostat to use for a year or so until you can save up for your forever thermostat. the thermostat probe DOES go between the glass and the UTH, and you use a probed thermoMETER or IR temp gun to measure the temp of the floor within the enclosure. do NOT tape over the probe, you can tape over the insulated wire but not the probe itself.
please read over the stickied thread on How To Set Up a Glass Enclosure if you haven't already.
lastly, welcome!!! beautiful lil mojave.
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