What should I do if glasses have streaks or spots on them?
Streaks and spots are usually caused by incorrect rinse agent settings. Depending on the hardness of your water, adjust the rinse agent dispenser to decrease streaks or spots. Refer to the rinse agent adjustment instructions to turn the arrow and find the recommended setting for your water type.
From the official Bosch Series 800 Dishwasher manual, page 24
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