Misting as needed really. The Acu Rite will let you know when it's time. After the foil method I was misting maybe once a week.
Didnt know that. Well then yeah just try the Petco or whatever area you're in see about local pet shops if Petco doesnt have it.
Another thing you can do for humidity is get a bigger water bowl btw. And for the head under his hot rock, to kind of tone it down you can elevate the tank OVER the UTH to let some air come thru and cool it down a bit. You could also increase the thickness of the substrate over that spot as well. Try folding up some newspaper then puttin the substrate over it. If youre using aspen or something like that. If youre using newspaper already just add a thick layer over it.