First time owner help please

[Bogertophis]

....
If the heat pad isn't getting everything up to temp, what are the options? The heat lamp may not work due to the humidity issue, but could I just thin out the substrate?

Once I get the temp all sorted, the only thing left will be getting the little guy to eat!

I'd be lost if not for this message board!!!

And on the original issue, whatever it was, it did wipe off with a damp cloth.

First, if the substrate is too thick (deep) and without air gaps*, it actually serves as "insulation" that prevents the UTH heat from rising into the cage. So yes,
either thin out the substrate (I forgot at this moment what you're using) or use something that is more porous, like chunky orchid bark* that allows heat to rise
because it's full of air gaps between the pieces.

Feeding...ahh, feeding! The next "hurdle", LOL. Can be fun or frustrating, but only time will tell...and yes, it sure helps to discuss & ask questions here.

RE "original issue" (dark stripes) I'm so glad that was an easy fix. We learn to be part-time detectives when keeping snakes. (it does get easier)