Have you checked for mites? Look in the water bowl for little black specks. It will look like pepper in the water. They will soak a lot if they have mites.
UTH temp needs to be around 88. The ambient temp on that side should be around 82. If I am reading this correctly your right side (cool side?) is too warm. Drop it down to 75.
It's either going to be mites or your snake can't get her body temp regulated.
What is your humidity like?