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If you haven't already come across this caresheet I found on GeckosUnlimited forums, I highly recommend reading! It's insanely detailed but really, really helpful!

You might want to get a thermostat like this one for the UTH, I found that mine was going crazy and getting up to 100F when I checked it with a temp gun. Here's a cheapie one off Amazon, it'd be better than nothing!

You might try some overhanging fake foliage to provide shade from the light and make her feel more secure, as well. As far as cleaning, you can clean with white vinegar which a lot of reptile peeps use and swear by. I personally prefer Zoo Med's Wipe Out, and Chlorhexidine which is also reptile safe but for deep cleaning, a vet grade sanitizer like F10 might be good.

Just make sure you quarantine her away from your other animals, and get a fecal test checking for parasites done for her if she poops. I'd also advise a visit to an experienced reptile vet, as her poor nutrition may have caused some deficiencies like MBD. As for diet, I might advise trying to get her some silkworms (which are pricey, but if she'll eat them they can help her recover) and a varied diet of Dubia, calciworms, hornworms, and occasional wax or mealworm (they shouldn't be her main diet, nutritional value isn't very high.)

She's a very lucky girl and hopefully with a little time and TLC, she will make a full recovery! No matter what, her quality of life will be 200% better with you and I'm sure she's very grateful