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Removing White Film from Glasses

Question: I’ve noticed my glasses have come out of the dishwasher lately with a foggy white film on them. Is there anything I can do to remove this and prevent it from happening again?

Answer: The foggy glasses are likely caused by hard water buildup. Try cleaning the glasses with vinegar from time to time and use a rinse agent in the dishwasher. If you have a water softener it may not be functioning properly. Make sure it is recycling.

The problem may be permanent if the glass is “etched”.

Here’s how to tell:

  • In a glass pie plate, soak one side of the affected glass in vinegar for one hour.
  • Remove the glass, rinse and dry. Hold the glass up to the light.
  • If the side soaked in vinegar looks different from the unsoaked side, the film is probably the result of hard water buildup.
  • If there is no difference between the two sides, the film is caused by a chemical reaction between some types of glassware and the water and/or detergent. This is permanent etching.

Make sure the glassware you purchase is dishwasher safe.

Source: The Case of the Sparkling Dishes Automatic Dishwashing for the 21st Centurypublished by The Soap and Detergent Association.

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