I too have read your posts. I am afraid I have offered everything I can think of.
I am thinking that the problem is that the area is sensitised now, and that she is going back to pick at it.
However regards the specific issue you describe of cleaning her leg, I can't comment really.
Does the vet think there is anything neurological going on with her?
And so sorry I didn't post a reply sooner ....
What with little one being ill and helping to bond a trio today, I have been a bit sporadic on RU replies xx hugs xx