How to Clean a Dishwasher Filter: Remove Food, Grease, and Odors

How to Clean a Dishwasher Filter and Remove Trapped Food, Grease, and Odors

A dishwasher filter catches food scraps and other debris before they reach the drain. When it becomes clogged with residue, dishes may come out gritty, water may linger in the tub, or the dishwasher may smell bad. Cleaning the filter is often a simple maintenance task, but its location and removal method vary by model. Check your owner’s manual before taking anything apart.

Find out what kind of filter your dishwasher has

Many modern dishwashers have a removable filter assembly at the bottom of the tub, beneath the lower spray arm. It may include a cylindrical upper filter and a flat mesh screen. Some models have a manual-clean filter that needs periodic rinsing; others use a self-cleaning system that grinds or flushes debris away.

Self-cleaning does not mean the dishwasher can never need attention. Food, labels, glass, or other debris may still collect near the filter or drain area. Some dishwashers also combine filter types. The manual is the best guide to what your model has and whether any parts are meant to be removed.

If you can’t find the filter, look up the model number, usually printed on a label along the inside edge of the door. Avoid pulling out unfamiliar parts or forcing a filter that won’t turn. A filter that appears stuck may have a locking mechanism or removal sequence specific to the model.

How to clean a dishwasher filter

Set aside a few minutes and gather a soft sponge or cloth, a soft brush, and mild dish soap. Wear gloves if you’re handling sharp debris. Avoid abrasive pads, wire brushes, harsh chemicals, and tools that could puncture the mesh.

1. Turn off the dishwasher. Make sure it is not running. If you need to reach near wiring, or the manual calls for it, switch off power at the breaker. For routine filter cleaning, keep your hands away from electrical components and follow the model’s safety instructions.
2. Remove the lower rack. Slide it out so you can reach the bottom of the tub. Check whether the lower spray arm blocks access. Remove it only if the manual explains how.
3. Locate the filter. Look near the center or back of the tub floor, around the sump or drain opening.
4. Unlock and lift out the filter. Many cylindrical filters release with a turn, often counterclockwise, but not all do. Follow the manual’s directions and lift gently. If the filter resists, stop rather than forcing it.
5. Clear loose debris. Remove food scraps from the filter and the accessible area around it. Watch for broken glass, sharp bone fragments, or other objects that could cut you. Do not reach blindly into the drain opening.
6. Wash the filter. Rinse it under warm running water. Use a soft brush and a little dish soap to loosen greasy film or food lodged in the mesh. Pay attention to seams and corners, where residue can collect. Rinse until soap and loosened debris are gone.
7. Clean the accessible filter well. Wipe away loose debris from the area where the filter sits with a damp cloth. Don’t pour cleaner into the sump or probe the drain with a utensil.
8. Reinstall the filter. Put it back in the correct position and lock it as directed. A filter that is not seated properly can allow debris through or interfere with dishwasher operation. Reinstall the lower spray arm or rack if you removed them.

If the manual specifies a different cleaning method, use it. Some filters should not be soaked, and some components are not intended to be removed by the owner.

Removing grease, trapped food, and odors

Food particles that cling to the mesh can usually be rinsed away with warm water and brushed off gently. Greasy buildup may take a little more work. A drop of dish soap and a soft brush are generally enough; rinse thoroughly so soap residue does not remain.

Don’t use bleach, drain cleaner, oven cleaner, or other harsh products on the filter. They can damage components, create hazardous reactions, or leave residues. Avoid mixing cleaning products. Unless the manufacturer specifically permits it, don’t put the filter in a dishwasher cleaning cycle with a chemical product.

If the dishwasher smells bad after cleaning the filter, check the rest of the tub for food scraps, especially around the door gasket and lower corners. Wipe those areas with a damp cloth. Run a normal empty cycle or a dishwasher-cleaning cycle only if the owner’s manual recommends one and specifies a compatible product. A persistent sewage-like odor may involve the drain hose, plumbing, or an air gap rather than the filter.

A dishwasher odor can also come from food left in the machine for a long time, a dirty interior, or water that is not draining properly. If the odor returns quickly, don’t keep masking it with fragrance or cleaning products. Look for an ongoing drainage problem or contact a technician.

How often to clean the filter

There is no single schedule that suits every dishwasher. Follow the manufacturer’s recommendation. If the manual gives no interval, inspect the filter regularly at first, then adjust based on what you find. Homes that run the dishwasher frequently, wash dishes with substantial food residue, or have several people using the machine may need more frequent cleaning.

Check the filter sooner if you notice:

• Food debris left on dishes or in the tub
• A sour or unpleasant odor
• Water that remains at the bottom after a cycle
• A drop in cleaning performance

Scrape large food scraps into the trash or compost before loading. Dishes generally do not need to be rinsed completely clean, but large pieces can collect in the filter. Follow your dishwasher’s loading instructions, too: dishes that block the spray arms can leave food behind even when the filter is clean.

Signs that the problem may be elsewhere

A dirty filter can contribute to poor drainage, but it is not the only possible cause. A small amount of water in the sump area may be normal on some models. If standing water covers the tub floor or remains after cleaning the filter, check the manual for model-specific guidance.

You can inspect accessible parts of the drain hose or air gap if the manual explains how, but don’t disconnect hoses or open panels unless you know the procedure and have shut off power and water as required. Call a qualified appliance technician if:

• The filter is damaged, cracked, or will not lock into place.
• Water continues to pool after the filter is clean and properly installed.
• The dishwasher displays an error code or repeatedly stops mid-cycle.
• You hear unusual grinding or persistent loud noises.
• You find broken glass or another object lodged where you cannot safely reach it.
• The machine leaks, trips a breaker, or has a burning smell.

A clogged dishwasher filter is an easy maintenance problem in many cases, but repeated drainage trouble can point to a blocked hose, a failing drain pump, or a plumbing issue. If basic, manufacturer-approved cleaning does not resolve it, stop troubleshooting and arrange service.

A small task that helps the dishwasher do its job

A clean filter gives food debris less chance to recirculate through the wash water. Inspect it on the schedule recommended for your model, clean it gently when residue appears, and reinstall it securely. If odors or drainage problems persist, the cause may be beyond the filter.