If your dishwasher has started leaving behind food bits, strange smells, or cloudy dishes, the filter may be overdue for a cleaning. A dirty filter can block water flow and reduce wash performance, which is why major manufacturers like Whirlpool, KitchenAid, Bosch, and GE Appliances all recommend routine filter maintenance. Source
Image source: The Spruce
Why dishwasher filter cleaning matters
The dishwasher filter traps food particles so they don’t get redeposited onto your dishes during the wash cycle. Over time, that trapped debris can cause odors, gritty residue, and poor cleaning results. GE says a drop in wash performance or dishes that feel gritty are common signs that the filters need attention. Source
What you’ll need
You don’t need much to clean a dishwasher filter properly. Most manufacturer guides recommend:
- Warm water
- Dish soap
- A sink or bowl
- A soft brush, toothbrush, sponge, or cloth
Whirlpool recommends warm water and a soft brush or old toothbrush, while KitchenAid suggests warm water, a sink or large bowl, and a toothbrush or soft sponge. Both caution against abrasive tools that can damage the filter. Source Source
Step 1: Remove the bottom rack
Start by pulling out the bottom dish rack so you can access the floor of the dishwasher. On most models, the filter sits at the bottom of the tub near the spray arm. Bosch, KitchenAid, and Whirlpool all begin the process by removing the bottom rack completely. Source
Step 2: Locate and remove the filter
Most removable dishwasher filters twist out. KitchenAid says to turn the upper filter assembly a quarter turn counterclockwise and lift it out, then remove the lower filter. GE gives similar instructions for fine and ultra-fine filters, while Bosch advises rotating the filter knob to the left and lifting it out. Because designs vary, it’s always smart to check your owner’s manual first. Source Source Source
Step 3: Rinse the filter under warm water
Once removed, rinse the filter under warm running water to wash away loose debris. For light buildup, this may be enough. KitchenAid says most soil and residue can be removed simply by rinsing with warm water, and Whirlpool says running water is often enough to clear away most food soils. Source Source
Step 4: Gently scrub stubborn residue
If food particles, grease, or mineral deposits remain, use a soft brush or sponge with a little dish soap. Bosch recommends warm, soapy water and a scrub brush, while GE says a soft brush or sponge may help remove stubborn soils or calcium deposits caused by hard water. Avoid scouring pads, wire brushes, or anything rough, since they can scratch or damage the filter. Source Source
Step 5: Soak for deeper cleaning if needed
For heavier buildup, KitchenAid recommends soaking the filter in a mixture of white vinegar and warm water for at least 30 minutes before gently scrubbing. This can be especially helpful if your dishwasher has hard-water residue or odor-causing grime. Source
Step 6: Reinstall the filter correctly
After cleaning, place the filter back into position and lock it securely. Whirlpool warns not to run the dishwasher unless the filter is properly locked, because a loose filter can damage the dishwasher. KitchenAid also says both upper and lower filter parts should be fully locked into place before using the appliance again. Source Source
Image source: Better Homes & Gardens
How often should you clean a dishwasher filter?
A good rule of thumb is every three to six months, but frequency depends on how often you run the dishwasher and whether you scrape or rinse dishes first. Whirlpool provides one of the most detailed schedules, ranging from once per year for households that prewash heavily to once per week for very frequent use without scraping or rinsing. GE recommends checking removable fine filters every other month or more often depending on use. Source Source
Signs your dishwasher filter needs cleaning
If you’re not sure whether it’s time, look for these warning signs:
- Dishes feel gritty after washing
- Food particles remain on plates or glasses
- The dishwasher smells bad
- Water seems to drain slowly
- The dishwasher isn’t cleaning as well as it used to
GE specifically notes that gritty dishes and reduced wash performance are key indicators of a dirty filter. Source
Important tip: not all dishwashers have removable filters
Some dishwashers use self-cleaning or maintenance-free filtration systems. KitchenAid notes that select models have maintenance-free filters, and GE says older models and some current machines may not have a removable filter to clean. If you can’t find one, check your manual rather than forcing anything apart. Source Source
Helpful links to include in your post
Here are a couple of useful links you can naturally add to the article:
- Full manufacturer guide from Whirlpool
- Filter cleaning instructions from KitchenAid
- Optional product link: Soft cleaning brush on Amazon
- Optional product link: Dishwasher cleaner tablets on Amazon
FAQ
Can I clean a dishwasher filter without removing it?
For removable filters, manufacturers generally recommend taking the filter out before cleaning so you can rinse and scrub it thoroughly. If your model has a self-cleaning filter, consult the manual for the proper maintenance routine. Source
Can I use vinegar to clean a dishwasher filter?
Yes. KitchenAid suggests soaking the filter in white vinegar and warm water for at least 30 minutes for deeper cleaning when residue is harder to remove. Source
What should I avoid when cleaning a dishwasher filter?
Avoid wire brushes, scouring pads, and harsh abrasive tools. Whirlpool, KitchenAid, and GE all warn that rough cleaning tools can damage the filter surface. Source Source
Conclusion
Cleaning a dishwasher filter is one of the easiest ways to improve dishwasher performance, reduce odors, and help your dishes come out cleaner. In most cases, the job only takes a few minutes and requires nothing more than warm water, a little soap, and a soft brush. If your dishwasher hasn’t been cleaning like it used to, this simple maintenance step is a great place to start. Source
