My female fire, Nova, is convinced that when she's in her tub that she could eat a bear. And subsequently, my hand. A full grown female is probably a little more intimidating, but if she doesn't calm down with husbandry adjustments and/or shed I'd encourage you to try and get her out of the tub even if she is hissy, just to see if it's just getting out of the tub that stresses her out. Nova turns into an insta puppy dog once she's out, it's just getting her out of the tub that she's nippy and hissy.

Get your ambient's a touch up and maybe bump the humidity for a possible shed, see what happens. I promise, if she does get a bite into you it won't hurt as much as it'll surprise you, and you'll join our bite club here All of my mammal pets have given me much more painful and curse worthy injuries (my mom's pug won't bite your hands if you can see them, but mess with him and play "what's alive under the towel"? Gave me one of the worst pinch bruises I've had that hurt for weeks! I would take a hundred snake bites over that)