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residue removal from exterior windows

10K views 6 replies 7 participants last post by  CoastalSoftwashUSA 
#1 ·
I did windows the other day and had a hard time removing some kind of residue on the window exterior. The home owner says he has in the past with great difficulty removed the residue with a razor. i tried the razor by wetting the glass then scraping but no good. I tried ajax with a scrunge sponge and it didn't work. I windexed and dried and it was still there. What is this stuff RAIN Minerals? I have no clue. what do I use to restore these windows?

Thanks,
 
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