You should try covering the outside of the viv with paper towels or newspaper. It keeps them from seeing their reflection and makes for a much happier, calmer beardie! :mrgreen:
My Sakura did that for a few days and after reading about covering the walls, I tried it and that made a huge difference.
I had paper towels on the outside of three walls of her viv for maybe a month or two and then took it down. She still saw her reflection but I think she was much more comfortable and secure and it didn't bother her after that.
Hope that helps!