Whirlpool · Kitchen · WDF520PADM · User Instructions
Clean the filter system when food soils remain on dishes or when wash performance drops. Remove, rinse, and reinstall the filter components as described in the manual.
Source: Whirlpool WDF520PADM User Instructions, pages 14-15
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The dishwasher instructions explain that the filter system may need cleaning when soils remain on dishes, and describe removing, rinsing, and reinstalling the filter components.
Whirlpool WDF520PADM User Instructions, pages 14-15This answer is only published when it has a reviewed answer status and a source citation back to the manual text.