Why Is My Glassware Cloudy?

It?s happened to all of us. You?ve opened your newly ran dishwasher to find your glassware covered in a milky film. You may think something is wrong with your dishwasher or attempt to use several types of dish detergent, but the likely cause behind the scum on your glass is hard water deposits.

Hard water is water that contains a high number of calcium and magnesium. The deposits left on the glass, the ?milky? film, is known as limescale, and these deposits are able to make many household cleaners less effective.

To test whether the issue is hard water, simply soak a glass in vinegar for a few minutes. If the limescale is removed, then hard water is the culprit.

How to Remove Limescale from Glassware

There are a few simple solutions to removing limescale from glassware.
  1. One that most households have lying around is black and white newspaper. The newspaper works as a reducing agent on the minerals and is removed by simply wiping the film off the glassware.
  2. Additionally, as previously mentioned, vinegar will loosen the mineral deposits when the glass is soaked.
However, the more efficient approach to dealing with limescale is to fix the issue from the source: in the dishwasher.

How to Eliminate Hard Water Deposits

There are a few approaches you can try to control limescale.
  1. Using more detergent may be effective in removing the deposits from your glasses. Fill both dish detergent cups and run the dishwasher.
  2. Your water temperature may simply not be warm enough. Detergent manufactures suggest a temperature of 130 degrees. Place a thermometer in a glass and run water to measure the incoming temperature. If your water temperature is lower than 130 degrees, you may have found the issue.
How to Remove Etching from Glassware

If vinegar did not remove the mineral deposits from your glassware, then the issue may be etching, which is the wearing away on areas on the glass. This commonly occurs when you have soft water.

If soft water is your issue, the solutions are fairly simple.
  1. Limit pre-rinsing as you may be removing the little bit of mineral deposits detergents actually need to work.
  2. Less soap will have a softer effect on your dishes, especially with soft water, and will not wear away at your glassware.
  3. No water softener. Especially with soft water, you will find that etching will occur more often.
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