Hey all!

This is my first post so go easy on me . I have just recently got my ball python last week, did a ton of research before. Please see my set up below.

-Substrate: Jungle Floor
-Housing: Zoomed 20 gallon long tank
-Thermostat: Zilla Watt
-UTH: Zoomed

My Issue is the thermostat and the UTH my basking temp sits between 86-87 when my thermostat is maxed out at around 105. My probe is placed directly under the UTH and taped and sealed with duct tape. For those of you who dont know the zilla probe is massive-Causing some sticking issues, hence the duct tape. I have a thermometer placed inside the tank under the substrate which is about half an inch. Ive tried everything to increase the heat and it just wont happen. Ive tried sealing the heating matt, putting as little substrate as possible but nothing is working!!! Also please don't suggest lights, I have heard they suck the humidity out and stress out the snake.

Please let me know what i should do.