Cleaning a 'film' off glass

The inside of my windscreen (BMW330i/2004) is covered with a film that I can only assume comes from the a/c - it's similar to the haze on a smoker's windscreen but more resilient to attack by cleaners (which just smear) and vinegar.

Any suggestions for getting it off and for anything I can do to stop it happening, apart from turning off the a/c of course?

Asked on 28 February 2013 by lauriemil

Answered by Honest John
Mer windscreen cleaner.
Tags: car care
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