I have a whitewtater that chomped me every time I tried taking her out of the rack. I recently had to move my snakes to a different room because I've got twins on the way. Anyway, after I moved them and had them in a slightly cooler place for a bit, and in different substrate as well.... I noticed that I could start picking up my whitewater chomper without any biting.
Maybe the new surrounding or a slightly cooler temp for a bit can enable some handling and a gradual lessening of the chomping. She had ripped me a bunch of times. I've only been bitten twice by other rosys and it was because I was doing some quick feedings and my hands smelled like thawed fuzzys YUM
When I was a kid I had a real grouchy gopher that I handled with gloves until it finally just stopped chewing on me
maybe that can help???