A thread on deep-cleaning your dishwasher so it stops smelling and actually gets dishes clean again

Your dishwasher isn’t self-cleaning. If it smells bad or leaves spots, the fix is usually a simple deep-clean, not a replacement. The big suspects: filter, spray arms, seals, and drain area.^[2][3]

Checkpoint 1: the filter. Food debris builds up there and can cause odor, poor wash results, and even drainage trouble. Clean it monthly if you run the machine often; some guides say weekly for heavy use.^[2][20][17]

Checkpoint 2: spray arms. If the holes clog, water can’t spray properly, so dishes come out dirty. Clear the holes with a toothpick or similar tool, and rinse the arms clean every few months.^[3][9][23]

Checkpoint 3: seals and door gasket. Wipe away grime, check for cracks or tears, and dry the area so mildew doesn’t build up. Several maintenance guides also flag the gasket as a common leak point.^[3][6][27]

Checkpoint 4: drain area and deep clean. Remove debris from the pump or bottom area, then run an empty cleaning cycle with vinegar or a dishwasher cleaner, following your manual. Monthly upkeep is the recurring theme across the guides.^{[3][4][14][40]}