A clean filter is necessary for optimal washing performance—if bits of food or other debris are caught in the filter, you could end up with dishes that are less than clean.
What to do:
Clean your dishwasher filter
First, reference your product manual for specific filter removal and cleaning instructions, since it can vary by model. To clean the filter, remove it from the bottom of the dishwasher and soak in warm, soapy water. For stubborn stuck-on bits, gently scrub the filter with a soft-bristled brush.
If your dishwasher still appears to be clogged after cleaning the filter, consult this guide for troubleshooting clogs.