If you have hard water stains on glass, you should remove them immediately. Hard water stains are more difficult to clean the longer they sit. They also get more noticeable the longer they sit.

In some locations, the water has a higher mineral content. Hard water stains are caused by evaporation. You can easily remove hard water stains on glass by following these steps.

Gather Materials

For this project, you need:

  • rubber gloves
  • protective eyewear
  • soft towel or rag
  • soft-bristle toothbrush or scrub brush
  • scrubby pad
  • distilled white vinegar
  • lemon juice
  • white toothpaste (optional)
  • baking soda

Avoid using stiff bristled brushes on glass, or you will scratch the surface. Test a hidden area of the glass with the chosen solution to test reaction. Lemon juice may irritate sensitive skin, so wear gloves when using it.

Clean Hard Water Stains with Vinegar

The acidic properties of vinegar help loosen the minerals. Mix one-third cup of vinegar in two-thirds cup of warm water in a spray bottle. If desired, add several drops of lemon juice to increase cleaning power.

Shake it well and heat it in the microwave for about twenty seconds to improve effectiveness. Spray the solution on the glass and let it stand for several minutes, so the vinegar can cut through the stain.

Soak a soft towel or rag in the mixture, hold the towel for a minute or two on the surface, and wipe the glass. Clean residue with a scrubby pad. Repeat again, if needed. Rinse the solution with a clean towel.

Use Fresh Lemon Juice

Clean the stains with fresh lemon juice. Fresh lemon juice works better than bottled juice.

Roll the lemon around on a hard, flat surface to make getting juice out of it easier. Cut the lemon in half and squeeze juice in a spray bottle. Squirt the solution on the glass, let it sit several minutes, then rinse.

Dab on Some Toothpaste or Baking Soda

To treat large stain areas or older stains, try baking soda. Baking soda is safe and biodegradable.

However, some experts say to mix it with vinegar, and others claim the vinegar will negate the benefits of the baking soda. To compromise, mist some vinegar on the stain and let it stand for thirty minutes. Rub the baking soda with an old, soft toothbrush or scrub brush, let it stand, then rinse.

Alternately, use white toothpaste, not gel. Rub a small amount of toothpaste on the stain with a towel or cloth and let it sit several minutes. Remove residue with a mixture of equal parts warm water and vinegar.

Clean moisture as soon as possible from glass to prevent hard water stains. If you don't trust your skill or if the stains still won't come off, contact a home cleaning service.