How to Clean a Dishwasher Filter in 10 Minutes (Plus: When to Replace It)

Why it matters

Why cleaning the dishwasher filter is not optional

Your dishwasher filter traps food particles, labels, bits of broken glass, and grease before they can reach the drain pump and clog it. It is doing its job every time you run a cycle. But unlike a sink strainer that you see and empty daily, the dishwasher filter is hidden under the bottom spray arm, out of sight. Most people never look at it until something goes wrong — standing water, bad smells, or dishes coming out dirty.

Debris on a user-removable filter can interfere with wash or drain performance and hold odor-producing soil. Inspection gives you evidence: note whether the mesh is coated, whether debris is present in the visible well, and whether cleaning changes the next comparable cycle.

Step by step

How to clean a dishwasher filter — step by step

1. Pull out the bottom rack completely. Set it aside so you have clear access to the tub floor. If there is standing water in the bottom, scoop it out first with a cup — you need to see what you are doing.
2. Locate the filter assembly. It is typically a round plastic cylinder about 3–4 inches in diameter, centered under the bottom spray arm. On most models, the spray arm hub sits on top of the filter. Some models have the filter offset to one side instead of centered — consult your owner manual if you do not see it immediately.
3. Unlock only as the manual shows. Twist, release tabs, or remove an upper piece only when the exact model instructions identify that motion. Do not assume every cylinder turns counterclockwise or that an adjacent screen lifts out.
4. Keep parts in removal order. Photograph the seated assembly before lifting anything. Set each approved removable piece down in order so its orientation and locking marks are preserved.
5. Use the approved cleaning method. Running water and a soft brush are common instructions, but use the temperature, cleaner, and tools allowed by the manual. Avoid abrasive tools and do not mix cleaning products.
6. Wipe out the filter well. With the filter removed, you can see into the sump — a small basin that collects water before the drain pump. Use paper towels to wipe out any sludge, food particles, glass shards, or labels you find. A flashlight helps — the sump is dark. Be careful not to push debris deeper into the drain opening. Remove everything you can see and reach.
7. Reassemble in reverse order. Place the flat mesh screen back first, aligning its tab with the notch. Then insert the cylindrical filter, pressing it down firmly and turning it clockwise (right) until it locks. It should sit flush and not wobble. Replace the bottom rack.
8. Run the manual-approved verification cycle. Restore power only after the filter is locked and the rack is replaced. Observe drainage, leaks, and unusual noise; stop if a part moves or the symptom worsens.

Model differences

Why the model number matters more than the brand

A single brand can sell removable-cylinder filters, flat screens, self-cleaning systems, and assemblies that require service access. The model number—often on the door edge or tub frame—is the reliable route to the correct diagram and maintenance interval.

If the manual does not describe a filter as user removable, do not remove spray arms, screws, sump covers, or pump guards to reach it. That is a service procedure, not routine filter cleaning.

When to replace

Signs your dishwasher filter needs replacement, not just cleaning

Filters are durable but not permanent. After years of heat, water pressure, and detergent exposure, the plastic and mesh degrade. Replace the filter if you notice any of these:

• The mesh has visible holes, tears, or thinning areas — debris will bypass the filter and damage the pump.
• The filter housing is cracked — even a hairline crack allows unfiltered water to reach the pump.
• The plastic has turned brittle, yellowed, or chalky — this is UV-like degradation from years of heated dry cycles.
• The filter no longer locks firmly into place, or wobbles after being seated — the locking tabs have worn down.
• You have scrubbed the mesh thoroughly and it still appears clogged or has a persistent film — the mesh pores may be permanently blocked by mineral scale.

Replacement filters cost $15–$40 for most common brands and are available from appliance parts retailers or directly from the manufacturer. The replacement process is identical to the cleaning process — remove the old one, drop the new one in.

Common mistakes

4 mistakes people make when cleaning a dishwasher filter

Questions readers ask

FAQ

• How often should I clean my dishwasher filter? Use the interval in the owner manual and inspect sooner when wash performance, odor, or visible debris changes.
• Do all dishwashers have a removable filter? No. Use the exact model manual to identify user-removable parts rather than inferring the design from age, brand, or sound.
• Will cleaning the filter fix standing water in my dishwasher? It can help when debris restricts the accessible filter area. If water remains, use the standing-water diagnosis rather than repeatedly cleaning the same part.
• Can I put the dishwasher filter in the regular dishwasher to clean it? Follow the filter-cleaning method in the model manual; many specify running water and a soft brush, but instructions vary.
• What if I cannot get the filter out because it is stuck? Stop rather than forcing or chemically soaking it. Recheck the documented locks and arrange qualified help if the manual-safe steps do not release it.

References

Fact-check notes

• Filter removal procedures cross-checked against owner manuals from Whirlpool, Bosch, GE, KitchenAid, LG, and Samsung (2018–2025 model years).
• Inspection and replacement intervals vary by model; the owner manual and manufacturer parts diagram are the authority for the exact assembly.
• A damaged or incorrectly seated filter should be handled through the manufacturer’s model-specific parts and service path.
• Mesh filter cleaning: Fine-mesh filters (like Bosch's) trap particles down to approximately 0.5mm. Brushing with a soft-bristle brush is sufficient to clear most clogs; chemical cleaners are not necessary and can accelerate plastic degradation.

Related guides

Keep reading

• Dishwasher Standing Water After Cycle
• Standing Water in Dishwasher Filter Area
• How to Deep Clean a Dishwasher
• Monthly Dishwasher Maintenance Checklist
• Dishwasher Smells Bad After Wash
• How to Clean Dishwasher Spray Arms

Fact check

Sources and scope notes

• Whirlpool Product Help: Cleaning the Removable Filtration System — running-water, soft-brush, and filter-reinstallation guidance.
• Whirlpool Product Help: Spray Arm Not Working — blocked-arm, loading, cleaning, and model-option checks.
• Filter and spray-arm removal varies by model; follow the owner manual before removing either part.