Gliders can be little stinkers, lol.
It could be any number of reasons, but from what you described I'm curious if you have changed anything you use on your skin, s/a soap, lotion, etc. It may be she has either taken a liking to the scent and wants to bite or maybe a strong dislike and wants to bite.
One of my gliders, and I'm not sure which one has discovered attacking my ear for entertainment
I can't be sure if they're biting or scratching it, but it hurts. I'm not able to keep my hair up, but whichever one it is will still look for my ear under my hair sometimes