Quick one really guys, Got in car to come home from work, side mirrors iced up, back screen iced up. Put demist button on (which does mirrors and back window) Mirrors not demsiting, touched glass stone cold steve austin, usually it is red hot. Back windows clear in 5 mins. Just check hand book and fuse 16 under bonnet 30 amp controlls both mirrors and back window, fuse has not blown. Any ideas pleeese, could really do with this now it is getting colder. Car Audi 80 93'L 2.0E Thanks! Oh and forgot to say, the electric movement of mirrors is still functional if that helps.