Best Glass Water Spot Remover

Hard water spots on glass are mineral deposits — calcium and magnesium left behind when sprinkler water or rain dries on a hot windshield. Plain glass cleaner won't touch them. Removers come in two flavors: a mild acid (vinegar-strength or stronger) that dissolves the minerals chemically, or a fine polish that mechanically abrades them off. Acidic types are faster but eat trim and paint if they run, so tape off rubber gaskets and rinse fast. Polish-based products are slower but safer around the surrounding panels. Either way, follow up with a glass coating or rain repellent so the next storm doesn't re-etch the same spots.

Glass Water Spot Remover

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