How do I clean the air gap to improve dishwasher drainage?
The air gap protects your dishwasher against water backing up if a drain clogs and is easy to clean. Turn off the dishwasher and lift off the chrome cover, then unscrew the plastic cap and clean it with a toothpick. You should check the air gap any time your dishwasher isn't draining well. (Page 17)
From the official GE GSD4210 Top Control Dishwasher manual, page 17
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