How to Remove Stubborn Water Stains from the Car Windshield?
3 Answers
Use a dry cloth dipped in a small amount of alcohol or high-proof liquor to vigorously wipe the glass. Use a clay bar to wipe back and forth. Apply dishwashing liquid to a towel and then wipe the glass. Spray vinegar or soda water on the water stains on the glass and wipe with a towel. Pour a cleaning agent onto a towel or sponge and wipe.
With a decade of experience in dealing with windshield watermarks, I can confirm these stains are mostly mineral deposits left behind by evaporating dirty water during car washes. First, thoroughly clean the glass surface and use a degreaser to treat the oily film layer—you'll find plain water can't remove these watermarks. I typically use professional water stain remover with a microfiber cloth, applying circular motions. For particularly stubborn spots, I let the solution soak for five minutes to soften the deposits. After treatment, remember to rinse repeatedly with clean water, and finally use a rubber squeegee to remove all moisture and prevent secondary residue. Nowadays, many car owners use low-quality wipers that accelerate watermark formation. I recommend applying glass coating monthly—it causes water droplets to slide off quickly while driving, leaving no traces.
Last time I parked my car under a tree for three months, and the windshield accumulated a thick layer of water stain marks. After trying various home remedies, I found that white vinegar—the kind you buy from the supermarket—works best. Pour half a bottle into a spray bottle with an equal amount of warm water, then spray it liberally on the water stains. Wait two to three minutes to let the acetic acid dissolve the minerals. The key is to scrub vigorously with old newspapers—the paper fibers provide more friction than a cloth. A special reminder: never use dish soap, as the alkaline components can make the water stains more noticeable. Once the vinegar smell dissipates, rinse the glass with clean water twice, and let it dry in the sun—it will be as clear as new glass. For daily parking, remember to avoid areas where tree sap drips, and apply a water-repellent coating to the glass before the rainy season as a preventive measure.
