Uth probe placement

[Eric Alan]

Yup that sounds good. And does this apply toward all types of snakes for example my corn. I currently have his probe on the bottom of the substrate should I move it to in-between the mat and glass?

I would. It takes "the elements" out of the equation and simplifies things. "The elements" could be anything - snake urine, spilled water, snake moving the probe, whatever. Any one of those things will lead to a probe not being able to report a reliable temperature to your thermostat.

To be clear, thermometer probes are a different story entirely. You want them to be on the inside where you want the temp measured - typically under the substrate and above the UTH.