A tad too warm?

[flatsix02]

Pulled my baby out tonight, a few hours after I finally got her a UTH, and she seemd almost moist from the heat / humidity... She seems to be a lot more relaxed and sprawled out under her rock now that I've gotten her the pad, but I'm worried with how moist she feels. I dont have a t-stat for her bedding over the heating pad (and I know I need one badly), but the air temp gauge in the tank says ambient 75ish, it doesnt flux much.

Shes in a 40 gal long, btw. Is this something i need to be worried about? Shes warm to the touch on her belly, but not hot or near damaging temps by any means. I guess I'm more worried about it being "too humid," is that possible?