guys
been using polarbrites new brush for about 6 weeks now and comparing to my super lite id actually favour it now.
although a bit heavier its bristles have stayed stiffer even with my hot system which has made it better at removing spider nests etc from corners
stiffer bristles also allow it to glide across the glass with less effort
its cheap at £19
the only thing id suggest doing is rounding the corners before useing on any wooden frames as i made my self work after chipping paint on frames
overall 8/10 imo