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How to Clean a Dishwasher (So It Actually Cleans)

A dishwasher that leaves grit, film, or odor usually just needs its filter cleaned. Here's the 15-minute reset — filter, spray arms, and a vinegar run — that brings it back to life.

2 min read
In your maintenance planClean the dishwasher filterSee the cadence, priority, and steps for Major appliances.

When a dishwasher starts leaving grit on glasses, film on plates, or a faint smell when you open the door, the instinct is to blame the machine. Almost always, it just needs its filter cleaned. The filter catches everything the dishwasher scrubs off — and when it clogs, that food gets pumped right back onto your dishes.

Why it matters

Modern dishwashers recirculate water through a filter to save water and energy. That design only works if the filter is clear. A clogged filter turns the wash water dirty, blocks flow to the spray arms, and breeds the odor that lives in a neglected dishwasher. A monthly filter rinse is the difference between dishes that come out clean and dishes you end up re-washing by hand.

The 15-minute reset

  1. Pull out the bottom rack to reach the base.
  2. Twist out the cylindrical filter, rinse it under hot water, and scrub gently with a soft brush.
  3. Clear the spray-arm holes — hold the arm and check each nozzle for trapped debris; poke out any clogs.
  4. Wipe the door gasket and bottom edge, where grease and food quietly build up.
  5. Run a vinegar cycle: stand a cup of white vinegar upright on the top rack and run a hot cycle empty.

If it still doesn't clean

  • Gritty dishes: the water may not be hot enough, or the racks are overloaded so water can't reach everything.
  • White film: that's hard-water scale — a vinegar or descaler cycle helps, and a rinse aid keeps it from returning.
  • Standing water in the bottom: the drain or the P-trap under the sink may be partially clogged; this overlaps with a slow kitchen drain.

When cleaning isn't enough

If a dishwasher leaks, won't drain, or stops heating despite a clean filter, weigh the repair against its age — most last around ten years. Knowing the signs an appliance is near the end keeps you from pouring money into a unit that's done.

Make it automatic

Build your free Owner Tools and we'll put the monthly filter rinse on your schedule with the rest of your appliance care. Free, no login, no address required.

Frequently asked questions

How often should I clean my dishwasher filter?+
Rinse the filter at least once a month, and more often if you don't pre-scrape plates. The filter catches the food the dishwasher washes off; once it clogs, dirty water gets recirculated onto your supposedly clean dishes. A monthly rinse is the single biggest thing you can do to keep a dishwasher actually cleaning.
Why is my dishwasher not cleaning dishes well?+
The usual culprit is a clogged filter recirculating dirty water, followed by blocked spray-arm holes that weaken the wash. Hard-water scale and grease buildup make it worse. Clean the filter, clear the spray arms, and run a vinegar cycle — that fixes most cases. If dishes still come out gritty, check the water temperature and that you're not overloading the racks.
How do I get rid of dishwasher smell?+
Odor almost always comes from food trapped in the filter and around the seals. Pull and rinse the filter, wipe the door gasket and bottom edge, and run a hot cycle with a cup of white vinegar. Keeping the filter clean from then on prevents the smell from coming back.

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