Removing Water Stains from Glass
To remove water stains from glass using WD-40, spray a generous amount of WD-40 directly onto the stained area. Let it sit for a few minutes to allow the WD-40 to penetrate and loosen the stains. Using a soft cloth or sponge, gently scrub the glass in circular motions to remove the water stains. Finally, wipe the glass clean with a damp cloth and dry thoroughly.