Polysporin is a double anti-biotic so close.
Get rid off the moss, switch to aspen ( for reptiles ) when you get this cleared up. in the mean time I would put her on a thick layer of paper towels.
I would soak her 10 or 15 minutes once a day depending on how she reacts.
If that's a heat rock, get rid of it and go to undertank heater and/or overhead heat light. A temperature gauge is a MUST !
Go to "South Mountain Reptiles" SMR for the proper tank set up or "search" here for the right way to keep your corn
Typing fast cause I got to go for a bit, sorry.......