Help with ball python thermostat

So I have a zillia thermostat and i followed a guide in this site on how to set up a python tank . The probe that reads the temperature is usually inside the tank but my screen top dies not allow that or there will be a space where my python escape. And I read somewhere that the python can bump into it and cause a inaccurate reading and make the thermostat pump out more heat potentially burning the snake. So I followed the guide people on this sit have recommended me to put it between the heatmat and the outside tank bottom. But the think is I have it set to 90 at first it was working but now it would turn on and shut off in 5 min can someone help me the temperature inside the cage I measured with a digtial thermometer gun and it's only 83 . Do I need to raise it to 100 since the probe is measuring the outside which will be hotter since the inside is separated with glass.

What is the temperature under the substrate where the UTH is located?

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Originally Posted by PitOnTheProwl

What is the temperature under the substrate where the UTH is located?

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The temp under substrate is 83 idk why I have my heat pad which is on the out side of the tank under its under its hide. In the day it goes to 87 but I was just wondering I want the thermostat to keep it constantly on and only turn off on times where it would over heat instead of turning off every 5 minutes anyways I just wanted to know since my baby ball python would not eat and I finally fed it and heard that it need s belly heat to help it digest I want to set the tempture higher but I'm afraid it might burn the snake

How are you getting that temp reading?

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Originally Posted by craigafrechette

How are you getting that temp reading?

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I have a digital tempeture gun I just point and press the trigger

Zilla is an on/off thermostat. It can have up to a 5 degree temperature swing if I remember right.
You want to check the temperature as soon as it clicks off. You can turn it up a couple degrees and adjust as needed.

Alright for now I'll leave it because my snake just ate and I don't want to stress it after 3 days I'll do it thank you for the help