Empty the dishwasher completely
Remove and clean the filter
Wipe the door, gasket, and edges
Check and clean the drain area
Clear food debris from spray arms
Run a hot cycle with dishwasher cleaner
Run a hot cycle with white vinegar
Sprinkle baking soda on the bottom and run a short hot cycle
Clean the utensil basket and racks
Leave the door slightly open after use
Rinse dishes before loading
Check for clogs in the drain hose
Replace a damaged or moldy gasket
Repeat cleaning regularly