The first thing I'll def do is try turning down her thermostat. I only had it on the higher end because I'm afraid of the cold (parents don't like turning the heat on for as long as possible). I'll stop the handling for now as well.
Normally I heat my rodents in warm water, not hot, all my other balls don't care if they get wet but with her I've tried putting it in baggies and also allowed them to get wet. Also the hairdryer method is a godsend honestly I use it all the time for my slightly picky male and he eats almost every time now. For her she definitely starts coming out of her hide looking for it, although she rejects it and starts her defensive biting habit if I try for too long.
And no I don't do the zombie tail thing lmao. I grab it by the back of the nexck and twitch it on the ground of the enclosure.