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.