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Hard Water Stains on Windows: What Causes Them, What Comes Off, and How to Prevent Them

by Mike Maharas | Oct 21, 2026 | Window Cleaning, Window Washing

If your windows still look spotty right after they have been cleaned, you are probably looking at hard water stains. They are common on homes around Lake Minnetonka and the west metro, and often misunderstood. Here is what they are, what can be done about them, and...
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