My Bosch Dishwasher Is Scratching My Plastic Glasses

Amount of Detergent

• Don't use too much detergent in your Bosch dishwasher. Bosch dishwashers will scratch your plastic glasses if you overdo the detergent; instead, fill the dishwasher detergent dispenser up only to the first line, not all the way. Although you can use either gel or powder detergent in your Bosch dishwasher, use powder detergent to minimize the risk to your dishes and get the best results.

Check Water Quality

• The quality of your water affects how it mixes with detergent in your Bosch dishwasher. If your water is too hard and you use too much detergent, the end result will be that the dishwasher scratches your glasses. Similarly, if your water is too soft, it can scratch your dishes, especially if you put in an excessive amount of detergent. Contact your water company to find out how hard or soft your water is.

Liquid Rinse Aid

• Always include liquid rinse aid when washing your plastic glasses in your Bosch dishwasher. Rinse aid helps maintain the proper softness in your water so that the water is less likely to scratch your dishes during the rinse cycle. If your water is too hard, it can scratch dishes while rinsing the detergent off even if you put the correct amount of detergent into the water.

Check Settings

• Your Bosch dishwasher requires a different amount of detergent depending on the wash settings that you use. If you use the Power Scrub setting, for example, the water will hit the dishes harder. Thus, you may need to adjust the amount of detergent -- if the water hits the dishes more powerfully, it needs less detergent to mix with so that it doesn't scratch your dishes while attacking dirt or grease.