A clogged filter is the number one reason dishwashers develop odors, leave a gritty film on dishes, and drain slowly. The good news: cleaning it takes about five minutes and no tools.
Where is the dishwasher filter?
The filter sits in the bottom of the tub, usually beneath the lower spray arm — a round plastic cylinder, often with a flat mesh screen around it. Most modern dishwashers (Bosch, KitchenAid, Whirlpool, Samsung, LG, and others) have a manual filter you're meant to clean regularly.
Step 1: Remove the lower rack
Slide out the bottom rack so you can reach the filter.
Step 2: Twist out the filter
Grip the cylindrical filter and turn it counter-clockwise (usually a quarter turn) to unlock it, then lift it straight out. Lift out the flat mesh screen underneath too if it's separate.
Step 3: Rinse and scrub
- Rinse both parts under hot running water.
- Use a soft brush (an old toothbrush works) with a little dish soap to clear trapped food, grease, and mineral buildup.
- Avoid wire brushes — they can damage the fine mesh.
Step 4: Wipe the filter housing
Wipe out the recess where the filter sits and remove any glass or debris — this protects the pump.
Step 5: Reinstall
Drop the mesh screen back in, seat the filter, and turn clockwise until it locks. A loose filter can rattle and let food bypass it.
How often should you clean it?
- Light use: once a month.
- Heavy use or you don't pre-rinse: every 1–2 weeks.
Signs of a clogged filter
- Musty or rotten smell
- Gritty residue on clean dishes
- Standing water in the bottom
- Slow draining
When cleaning isn't enough
If the dishwasher still won't drain or clean after a filter cleaning, the drain pump or spray-arm motor may be failing. True Appliance Repair connects you with same-day technicians for all major brands, including Bosch and KitchenAid. Call 1-888-298-3714.
Frequently Asked Questions
How do I know if my dishwasher has a filter I can clean? Look at the bottom of the tub under the lower spray arm. If you see a twist-lock cylinder or removable mesh screen, it's a manual filter meant to be cleaned. Older models may have a self-cleaning grinder instead.
What happens if you never clean the dishwasher filter? Food and grease build up, causing odors, poor cleaning, standing water, and extra strain on the pump — which can lead to repairs.
Can I put the dishwasher filter in the dishwasher? No — hand-rinse and brush it. Running it through a cycle won't dislodge trapped debris and can push food deeper into the mesh.