Safety first: Turn off power before deep cleaning inside the sump.

Clean filters and sump: Remove and scrub filters with hot soapy water. Wipe inside the sump area to remove trapped debris.
Run cleaning cycle: Run an empty hot cycle with a dishwasher cleaner or a cup of white vinegar on the top rack.
Improve drainage: Ensure the drain hose has a proper high loop and no sags where water can stagnate.
Leave door ajar: After cycles, leave the door slightly open to allow ventilation and prevent mold growth.

Unpleasant odor coming from the dishwasher, especially when opened after being idle.

Possible Causes