Congrats on your new snake!
Roaming (during the day) is a symptom that the ball python is very hungry, exploring a change to the environment, or is displeased with something and is searching for a way out.
While I see some of my ball pythons sometimes submerge themselves for weeks at a time in their water bowls: too much humidity in the air can be very harmful. If you are struggling to maintain balance...I recommend you make a humid hide and place it in the 80F zone of your enclosure and not even try to regulate humidity in the entire enclosure.
Also, both your UTH and CHE should be controlled by thermostats. The probe to the UTH thermostat can be placed directly on the heat pad on the outside of the enclosure sandwiched between the surfaces and the temperature output calibrated by using a IR Temp Gun on the contact surface inside (for measurement). I always recommend that all heat sources should be regulated by a thermostat, or at the very least a rheostat that is adjusted on a regular daily basis.
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