Just think of what she's been through and be patient.
There are ways to work inside the cage without her attacking you, see if you can get her out & into a bonding pouch using the inside-out trick, that way you can clean real good without interruption.
Then before you put her back in, try to see if she is less aggressive when outside the cage. In a safe, secured location open the pouch slowly and have a treat ready to bribe her when she pops out all crabby ('cause she most likely will).
You can try having a spoon of some licky treat ready, so your hands are not so close. I've noticed that my one glider that was that way behaved a little less aggressive when not in her cage but in her sleeping pouch, she didn't like the bonding pouch, so it still took time to work on that, it did help though.
You could also try the spoon trick from outside the cage & let her lick it off from between the bars.
Hang in there, consistency and patients are the winning combination.
Wish you best of luck!