Once the physical blockages are gone, use a natural chemical reaction to dissolve grease and deodorize the pipes. Best Ways to Unclog a Dishwasher
This is the #1 best thing you can do.
It starts subtly. A faint, swampy smell wafting from your otherwise clean dishwasher. Maybe a whisper of grime left on the "clean" glasses. Or the worst-case scenario: a half-inch of murky, cold water sitting at the bottom of the machine after a full cycle. best way to clean dishwasher drain