He's an adult, so 100F should be fine for a temp. What sized tank do you have him in? The UVB is wonderful, so it's not that, the baths are fine, so it's not that. My Titan, who's about 9 mo old (a rescue from a petshop, so not sure of his exact age) has parasites, and is going to the vet on Saturday (he's already had one dose of Baytril, but they came back) yet he was eating lots and was active until today, when he didn't eat his salad as he normally does and wasn't very active, so I'm glad I'm getting him to the vet on next Saturday, taking in another sample, guess that last sample I took in was too early after the treatment.
So hopefully you'll get that soon. Cheryl does sell the meds needed to get rid of them, too. Just stay in touch with her to let her know to send the meds needed and ask her how much they cost.
Good luck and keep us informed. Parasites are a pain but easy to get rid of. 3 weeks after the medication is done is when you send in another sample to make sure they're gone. Sometimes, like Titan, they need another dose.