Etching of glassware

What is etching, what causes it and how to prevent it:

• Etched glassware appears cloudy or hazy. It is a permanent condition, and there is no
  practical method to restore the original luster.
• Most table glassware is described as soda-lime glass. The basic composition is silica (sand),
  soda ash, lime and other minor ingredients.
• Etching is removal of metal ions from the glass surface leaving the silica exposed. This is
  a simple statement for a complicated chemical process.
• The etching of a glass surface is a slow process. Many factors are involved and each will
  promote etching. Water alone can etch glassware given sufficient dishwasher cycles.
• Natural soft water or softened hard water promotes the etching process.

To retard the etching or possibly prevent etching, the following is recommended:

• Use minimum detergent -- one tablespoon.
• Under-load the dishwasher to allow maximum rinsing.
• Use a rinsing agent, like Jet Dry or equivalent, to provide
  sheeting off of water in the final rinse.
• Use correct water temperature of 140°F to 150°F.

Hard water areas may allow food soils and mineral deposits to adhere to the glass surface.
This condition can promote etching.

• More detergent must be used -- increase detergent in increments
  of one teaspoon to arrive at optimum washing.
•  Use Jet Dry to sheet off water in the final rinse.
•  Use Glass Magic or equivalent product with detergent. This provides the
  stripping of hard water film or food soil film.