Q My lawn sprinklers leave tough, spotty residue on my windows. I’ve tried glass cleaners, carbonated soft drinks, vinegar and acid-based cleaners that are supposed to remove mineral scale. Nothing works. What else can I try?
A I’d try Spot-X Hard Water Stain & Spot Remover, a cleaner formulated to mechanically (not chemically) remove mineral residue from hard surfaces such as glass, mirrors, porcelain and chrome. Its gentle abrasive action is by means of powdered walnut shell, specifically the Juglans regia, or English (European) walnut. In the meantime, you may want to swop those sprinkler heads or adjust their pattern so that they don’t spray the windows.