How to Clean a Dishwasher Filter: Step-by-Step Guide for Better Cleaning
You unload the dishwasher expecting sparkling dishes, but instead you find grit, grime, and a funky smell—and your first thought is that the machine is broken.
TL;DR
A dirty dishwasher filter is one of the most common reasons for poor cleaning performance. The fix is simple: locate the filter at the bottom of the dishwasher, twist it out, rinse it under warm water, gently scrub away debris with a soft brush, and lock it back in place. Clean manual filters at least once a month to prevent food buildup, odors, and costly pump damage .
Key Takeaways
- The filter traps food particles to prevent them from recirculating onto your dishes and clogging the pump .
- Manual filters need monthly cleaning; self-cleaning filters with grinders require less maintenance but are noisier .
- Signs of a dirty filter include food residue on dishes, standing water, unpleasant odors, and visible buildup .
- Soak and scrub gently with warm soapy water and a soft brush—never use steel wool or harsh chemicals that can damage the mesh .
- Always consult your manual for model-specific instructions before removing or cleaning the filter .
Why Your Dishwasher Filter Matters
The dishwasher filter has two critical jobs: it protects the pump from getting clogged or damaged by food debris, and it prevents bits of last night’s dinner from recirculating back onto your dishes . A clean filter means better water flow, spotless dishes, and no unpleasant smells .
When the filter gets clogged, several problems arise :
- Food particles can recirculate and re-stick to your dishes
- Water drainage becomes slow or stops completely
- Bacteria and mold start growing in the trapped debris
- The motor works harder, which can lead to expensive pump failure
Whirlpool senior analyst April Taylor explains: “Failing to maintain it can result in problems including worsened cleaning performance like visible food particles after a cycle, improper drainage, buildup like grit or grime, odors from leftover debris, mold or mildew, and potential clogs” .
Identify Your Filter Type First
Before you start, check what kind of filter your dishwasher has. This matters because the cleaning approach differs :
Manual (Removable) Filters
- Have a mesh screen that catches food bits
- Require regular hand cleaning (monthly or more often)
- Common in newer, energy-efficient models
- Quieter operation
Self-Cleaning Filters
- Have a built-in grinder that pulverizes food chunks
- Need less maintenance but are noisier
- Still benefit from occasional inspection
To determine your filter type, check your dishwasher’s manual or look at the bottom of the tub. If you see a twist-off cylindrical part, you likely have a manual-clean filter .
Step-by-Step Guide to Cleaning Your Dishwasher Filter
What You’ll Need
- Warm water
- Mild dish soap (a degreaser like Dawn works well)
- A soft brush or old toothbrush
- Microfiber cloth or sponge
- Small bowl or basin for soaking
Safety reminder: Turn off the dishwasher and disconnect the main plug before cleaning the filters . Wait until the appliance is cool—hot water and steam can cause burns .
Step 1: Empty and Remove the Bottom Rack
Take out all dishes, utensils, and the bottom rack from the machine. This gives you clear access to the filter at the base of the dishwasher .
Step 2: Locate the Filter
The filter is typically located at the bottom center of the dishwasher, around the base of the lower spray arm. It usually looks like a short cylindrical tube with a mesh screen .
Step 3: Remove the Filter
Twist the filter counterclockwise to unlock it, then gently lift it out . Some models have two parts: a cylindrical upper filter and a flat lower filter beneath it. Remove both parts if present .
Step 4: Rinse Off Loose Debris
Hold the filter under warm running water to wash away food particles and loose buildup . Tap it gently to dislodge any trapped gunk.
Step 5: Soak and Scrub
For stubborn residue, soak the filter in a mixture of hot water and mild dish soap for about 5 to 15 minutes . After soaking, use a soft brush or old toothbrush to gently scrub the mesh . Be careful not to damage the delicate mesh or plastic parts .
Important: Never use steel wool, wire brushes, or harsh chemicals—they will damage the filter .
Step 6: Clean the Filter Housing
While the filter is soaking, dip a sponge or microfiber cloth in the soapy water and wipe out the filter housing inside the dishwasher . Remove any food particles, grease, or grime from the edges and corners . If there is stuck-on debris, sprinkle your sponge with baking soda and scrub—the baking soda acts as a gentle abrasive .
Step 7: Rinse and Dry
Rinse the filter thoroughly with warm water to remove all soap and debris . Ensure it’s completely clean and dry before reinstalling to prevent mold growth .
Step 8: Reinstall and Lock
Place the flat filter back first (if applicable), then insert the cylindrical filter on top . Turn it clockwise until it locks securely into place. Make sure it’s properly positioned—a loose or misaligned filter can cause leaks or poor performance .
Step 9: Run a Test Cycle
Replace the bottom rack and run a short empty cycle. You can add a cup of white vinegar to the bottom of the dishwasher or use a commercial dishwasher cleaner to help remove lingering odors and disinfect the interior .
Signs Your Filter Needs Immediate Cleaning
- Visible food buildup in the filter when you check it
- Water not draining properly or standing water at the bottom
- Unpleasant odors coming from the machine
- Food residue or stains left on dishes, glasses, or cutlery after a cycle
- Gritty or grimy dishes even after running a full cycle
- Food particles clogging the sprayer arm
Comparison Table: Filter Types and Care
| Filter Type | How It Works | Cleaning Frequency | Noise Level |
|---|---|---|---|
| Manual | Mesh screen traps food | Monthly or more often | Quieter |
| Self-Cleaning | Grinder pulverizes food | Less frequent | Noisier |
How Often Should You Clean the Filter?
For most households, cleaning the dishwasher filter once a month is the sweet spot . However, frequency depends on several factors:
- Heavy usage (daily loads with soiled dishes): Clean every 2-3 weeks
- Light usage or pre-rinsed dishes: Clean every 6 weeks or when you notice signs of buildup
- Self-cleaning filters: Clean every 2-3 months
Some sources suggest cleaning as little as every 3 to 6 months, but monthly is a safer bet for optimal performance . Always refer to your dishwasher’s manual for specific guidance .
FAQ: Dishwasher Filter Questions
1. Why does my dishwasher smell bad even when the filter looks clean?
Odors can also come from the drain hose, garbage disposal connection, or the filter housing. Wipe down the housing and run a cleaning cycle with vinegar or a commercial dishwasher cleaner .
2. Can I clean the filter with bleach?
No. Bleach can damage the delicate mesh and plastic parts. Stick to mild dish soap, warm water, and a soft brush .
3. My dishwasher doesn’t have a removable filter—what should I do?
You likely have a self-cleaning filter with a grinder. Check your manual—these require less maintenance but may still need occasional cleaning .
4. How do I know if my filter is damaged?
Inspect it for cracks, holes, or bent mesh. If damaged, order a replacement from the manufacturer .
5. Will cleaning the filter really improve dishwashing performance?
Yes. A clean filter allows for better water circulation, prevents food from recirculating, and helps detergent dissolve properly .
6. Should I scrape dishes before loading?
Yes. Scraping off excess food reduces the debris that ends up in the filter, meaning you won’t need to clean it as often .
Which part of your dishwasher gives you the hardest time—the filter, spray arms, or something else? Share your experience in the comments!
References
Dishwasher filter maintenance guides and manufacturer recommendations for optimal cleaning performance:
