I have experienced the sliding perspex windows rattling in the frames and have cured the problem with a couple of white window wedges bought from a DIY store. Although they are "wedged in" at the bottom of the overlap they are noticable.
I'm wondering whether anyone has found a source of clear soft plastic wedges which could be used and be less visually noticable.
I will continue to use that white ones as the "cure" is far better that the annoying rattle.
