
Screen smear removal
I've got a wonderful something on my cars screen - in real life it's only visible when dark or just at the right angle. No idea what it is, or then it arrived - but I noticed it after I got my car serviced.
It looks clear, or opaque when it's visible, and feels rough and slightly raised from the screen itself.
It's been wiped with damp microfiber and autoglym fast glass (briefly) but nothing seems to be moving it. Any ideas before I try fast glass again, or dare diluted isopropanol?