I've been dealing with a severe burn for a little over a month. Honestly, it looked like the snake got burnt, the wrinkly funny looking belly skin/scales are dead icky skin and he's healed almost completely.
1: a t-stat should be on that UTH, don't even bother plugging it back in until you have one. I saw it's on your list![]()
2: he should never ever be on "wet" substrate. Damp is different because most substrate will hold moisture a little. But he should never be on anything wet. Mainly because (as my vet said) "wet can lead to cold and wet and cold can end with an RI". If he's on paper towels and you're having humidity issues..get some sphagnum moss and soak it, squeeze excess water out and stick it in Dixie cups around the enclosure.