Help, ball python trying to escape

[Bogertophis]

...Ground temp on cool side is 26°, hot side is 28.6 but it's probably hotter than that, since my BP moved the thermometer probe up from under the substrate. For substrate i use coconut fiber, and to get out my boy tries to push up the lid.

You cannot be guessing what the high temp. is in his home, & 26-28 is okay for cool/ambient, but not warm enough for digestion- his "warm side" should be 30-32*, but you also MUST make sure it's not exceeding that. There's a fine line between health-promoting & un-safe for BPs.

And the temp. probe belongs on the OUTSIDE- never inside where it WILL get moved or wet, & not register accurately. Once you set the thermostat to achieve the right warmth inside, you need to be double checking more than once (& under the substrate where the snake can potentially make contact) with an accurate temp. gun- you cannot rely on what a t-stat is set to, you have to make sure of what it's actually achieving. And it's totally unsafe if the snake can move the probe, your snake can get injured- "burned"- by excessive heat.