In terms of the mite treatment there’s a product you can get which I have used numerous time but do your own research it’s a mite that hunts snake mites called Taurrus.
These will rapidly hunt and consume the mites then die off and are completely harmless to your reptile.
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Except I don't think they're available or legal in the U.S. so that probably won't help.
Rudeness is the weak man's imitation of strength. Eric Hoffer(1902 - 1983)
“The greatness of a nation and its moral progress can be judged by the way its animals are treated.” ~ Gandhi