Cascade Platinum Rinse Aid with etch protection is a product that prevents etching on glass from dishwashers. Ways to prevent etching include adjusting the temperature of the water entering the dishwasher to 140 degrees Fahrenheit, and omitting heat during the dry cycle if that is an option.
Omitting water heating products such as Power Boost, TempBoost and Power Scrub prevents etching. Etching can also be reduced by adjusting the amount of detergent used to the degree of water hardness. For example, if the water has zero to 3 grains hardness, use 1 tablespoon of dishwasher detergent per wash; for 4 to 6 grains hardness, 2 tablespoons.