What is the ambient temp? Is 85 ambient, or just a hot spot.
She shouldn't be particularly hot to the touch anyway since her body temp is the same as the environmental temp. And if the environmental temp is lower than your body temp, you're going to think she's cool.

So currently, bump up your hot spot to 95.
Is she making any popping noise? Is there any mucous or bubbles coming out of her mouth or nostril?
Sneezing?? Never heard a snake sneeze.