its the interior really, im stupidly anal about having a perfectly clear screen, the outside is fine and i go through huge amounts of screen wash, the outside has CarLack glass sealant on it and its spot on
its the build up inside that i hate, im tempted to use some brake a clutch cleaner on it lol
i got some Turtle Wax cloths from Halfords yesterday, the ones with the very tight no pile weave, ive found that cloth very good in the past but couldnt buff properly with them as the bite they give was giving me problems trying to wipe the window in a clean sweep
so, ive gone and ordered a Dodo Supernatural Window Waffle one aswell lol