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Old 01-05-2014, 01:27 PM   #6
oem4me
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Join Date: Aug 2010
Location: Burbank CA
Posts: 3,055
Re: Hard water spots.

Whatever you use, you may have to let it sit awhile to loosen up the deposits. Have you tried saturating several layers of paper towels and pasting them on the window so it can work slowly? I've had good luck with vinegar on various things this way.
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