Whirlpool recommends removing and cleaning the filter once a month when using the Quiet Plus daily. Clean the filter more frequently if you wash dishes two or more times a day. Removing the filter takes only a few seconds without any tools or special materials.
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Push up on the lock button recessed into the top of the Whirlpool door to open the appliance, which stops running if it is in the middle of a wash cycle.
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Lower the door and pull the bottom dish rack forward so it rests on top of the door.
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Turn the round filter screen in the bottom of the Whirlpool counterclockwise one-half turn to disengage the part from the interior cabinet.
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Pull the filter cylinder straight up and remove it from the Whirlpool for cleaning or replacement.