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8. Removing Water Stains
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Another hack the WD-40 can do is to remove those ugly water stains that can be found in your bathrooms and kitchens. Bathroom mirrors, sinks, kitchen counters and windows are all victims to water stains, so spray them down with WD-40 and wipe with a clean, dry cloth. WD-40 prevents water stains from forming and staining these areas for prolonged periods of time.