To remove hard water stains from windows, use a mixture of vinegar and water to dissolve the mineral deposits. Apply the solution and let it sit for a few minutes before scrubbing the spots with a non-abrasive sponge. For tough stains, a glass-specific cleaner or a mixture of baking soda and water may be required to fully restore clarity.

Hard water stains form from mineral deposits left by evaporating water. Regular cleaning prevents buildup, while a vinegar solution helps remove stains. More stubborn spots may need commercial cleaners or baking soda, but regular maintenance keeps your windows looking clean and clear, enhancing their transparency.