Etch stains--also known as water spots or water stains--are typically caused by hard water. Hard water has a high amount of dissolved minerals, which will coat the glass giving it a white, cloudy look. Etch stains can develop on shower doors, windows, cups, dishes and any other glass items that are exposed to the water. Hard water also prevents your detergent--both dishwasher and laundry--from preforming properly. Etch stains will give your glass items an overall dingy look. You can remove the etch stains from glass without the use of harsh chemicals.
Pour distilled white vinegar into a small bowl. Saturate a toothbrush or sponge in the vinegar. Vigorously scrub the etched stains with the vinegar until you have cleaned the glass. Rinse with cool water and towel dry.
Place 2 tsp of baking soda into a bowl. Add 1/4 tsp of vinegar to the baking soda and mix thoroughly to form a paste. Dip a sponge into the paste. Scrub the etched stains with the sponge and paste until the hard water spots are gone. Rinse with cool water and towel dry.
Fill your kitchen sink with hot water. Add 1 cup of distilled white vinegar and swish the water around to mix thoroughly. Submerge the glass into the water-vinegar mixture and allow to soak for 10 to 15 minutes. Wipe the etched stains from the glass with a sponge saturated in the water-vinegar mixture. Rinse the glass clean with cool water and wipe dry with a towel.
Pour undiluted white vinegar into a spray bottle as an alternative. Spray glass items--such as windows and shower doors--with the vinegar. Scrub the glass with a clean sponge to remove etched stains. Rinse with a damp cloth and wipe dry with a lint-free towel.