How do I.....................

Stop the grey film that I continually get on the inside of the front screen? It looks like the screen has misted up but it hasn't and is only visible when driving into the sun. I suspect it may be something to do with running the climate control all the time.

No way to stop it. Try some AutoGlym fast glass from halfords or my favourite Chemical Guys glassWORKZ which can be ordered online from them.

I've been told that the grey film is generated by the plastics used in car interiors - my last Audi A5 was terrible in that regard. The leather topped Prestige dash seems less badly affected.

A nearly dry exterior drying cloth (I use one of those 'Water Magnet' cloths) gets the glass clean.

Seems far worse with a diesel, any decent glass cleaner should shift it with a nice clean cloth, but not the easiest of jobs to do, so something that reduces build up would be useful.