Thrive easy clean terrarium husbandry issues

[Homebody]

If your probe is on top of your substrate, then your UTH is going to heat up until the top of your substrate is 89 degrees. But if the top of the substrate is 89 degrees, the bottom is going to be dangerously hot. You should put the probe between the UTH and the bottom of the enclosure and reduce or eliminate the substrate over the UTH. That will allow the heat from the UTH to reach your BP without raising the temps in your enclosure to dangerous levels. That is, if I understand your set up. If that doesn't work, you could always just remove the UTH. The CHE should provide sufficient heat.