What will get rid of pattern marks on my windscreen?

My car has patterning on the windscreen when wet - the wipers don't get rid of it. I assume it's from polish used by the car cleaners. Can you suggest anything to get rid of the patterns?

Asked on 14 November 2017 by Martin Wakely

Answered by John Slavin
A good quality glass cleaner like Rain-X or a glass polish like Autoglym Glass Polish, applied inside and out, should clear it up.
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