J.R.
Hi G.,
That's a tough one, but since you've tried taking things away with no success, why not try a reward system? You can make a chart with days of the week and stickers for each time she has a "good" day. Maybe after each good day or week (depending on her need), you could reward her - could be a treat or an outing - whatever is most important to her. It worked with my son for a seperate issue - worth a try.
Good luck - J.