Cleaning a dishwasher filter takes under 10 minutes and should be done monthly. Remove the lower rack, twist out the cylindrical upper filter counterclockwise, lift out the flat mesh filter beneath it, rinse both under warm water, scrub with a soft toothbrush and dish soap, then reinstall in reverse order. A clogged filter is the number-one cause of dishes coming out dirty or with a gritty film.
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Quick Summary
- Frequency: Monthly (every 2–3 weeks for busy households)
- Time required: 5–10 minutes
- Tools: Soft toothbrush, dish soap, warm water — no special tools
- Location: Bottom of the tub, under the lower rack
- Signs it needs cleaning: Gritty dishes, bad odour, standing water, gurgling drain sounds
Why the Dishwasher Filter Matters
The filter captures food particles during each wash cycle, preventing them from recirculating onto your dishes and from clogging the drain pump. When the filter becomes clogged, water cannot flow through it properly. The result is a weak wash, food redeposited on dishes, and eventually a drainage failure that leaves standing water at the bottom of the tub.
Most modern dishwashers — including all Bosch, Samsung, LG, and KitchenAid models — use a manual-clean filter rather than the self-cleaning grinder found in older American machines. The manual filter is quieter and more energy-efficient, but requires regular maintenance that many homeowners overlook entirely.
Brand-Specific Filter Locations
| Brand | Filter Location | Removal Method |
|---|---|---|
| Bosch | Centre-rear of tub floor | Twist counterclockwise and lift |
| Samsung | Centre-front of tub floor | Lift straight up (no twist needed on many models) |
| LG | Centre of tub floor | Twist counterclockwise and lift |
| Whirlpool | Centre or rear-left of tub floor | Twist counterclockwise and lift |
| GE / GE Profile | Centre of tub floor (some older models: self-clean only) | Twist counterclockwise and lift |
| KitchenAid | Centre of tub floor | Twist counterclockwise and lift |
Signs Your Dishwasher Filter Needs Cleaning
- Dishes, glasses, or cutlery come out with a gritty or sandy film
- Food particles are visible on dishes after a completed cycle
- A foul or musty smell from the dishwasher — especially when you open it
- Standing water at the bottom of the tub after a cycle ends
- A gurgling sound during the drain phase of the cycle
- White chalky residue on glassware (can also be hard water, but often filter-related)
Step-by-Step: How to Clean a Dishwasher Filter
Remove the lower rack
Pull the lower dish rack straight out until it clears the dishwasher. You need clear access to the entire tub floor. Set the rack aside on the counter or floor.
Locate the filter assembly
Look at the tub floor for the filter assembly — a cylindrical mesh tube sitting in a round opening, often surrounded by a flat fine-mesh plate. Use the brand location table above if you are unsure where to look. On Bosch models the assembly is at the centre-rear; on Samsung it is typically centre-front. Shine a flashlight if the tub is dark.
Remove the upper cylindrical filter
Grip the upper cylindrical filter and rotate it counterclockwise — typically a quarter to half turn. It should lift straight out once unlocked. Some models have an arrow indicating the unlock direction printed on the filter cap. On Samsung models many filters lift straight up without any rotation.
Lift out the flat mesh filter
With the upper filter removed, the flat fine-mesh filter below can now be lifted out. Note its orientation before removing it — some filters are directional. Inspect it for trapped food, grease, or debris in the mesh.
Rinse and scrub under warm water
Hold both filters under warm running water at the kitchen sink. Rinse away loose food debris first. Apply a small amount of dish soap to a soft toothbrush and gently scrub the mesh surfaces — pay attention to any clogged holes where food has become packed. Do not use abrasive pads or stiff brushes, as these damage the fine mesh and can cause it to release particles into the tub. Rinse until the water runs completely clear.
Reinstall the filters
Place the flat mesh filter back into the tub floor first, ensuring it sits flush with no gaps at the edges. Insert the cylindrical upper filter and rotate clockwise until it clicks or locks. Give it a firm tug upward — if it comes loose, the lock has not engaged properly. A loose filter allows food to bypass the mesh and reach the pump.
Replace the rack and run a flush cycle
Slide the lower rack back in. Add a cup of white vinegar to the bottom of the empty tub (or use a dishwasher cleaner tablet) and run a short hot cycle. This flushes any remaining debris from the spray arms and drain lines, and helps eliminate odours that built up during filter neglect.
Pro tip: While the filter is out, reach into the filter opening with a damp cloth and wipe out any debris sitting at the bottom of the sump area. This is where food accumulates below the filter and can cause persistent bad odours even after the filter is clean.
Never run the dishwasher without the filter installed. The filter protects the drain pump from food particles. Running without it can result in a blocked or damaged pump — a repair that costs $150–$300.
When to Call a Professional
A clean filter resolves most dishwasher performance issues. If problems persist after cleaning, these may indicate a mechanical fault:
- Standing water after cleaning the filter — drain pump blockage or motor failure
- Dishes still dirty after a clean filter and hot cycle — spray arm clogged or wash pump issue
- Water leaking onto the floor — door gasket, door latch, or pump seal failure
- Error codes displayed — check our brand-specific error code guides or call for service
Our certified technicians service all major dishwasher brands across Toronto and the GTA. $89 diagnostic fee — waived when you proceed with repair. $40 OFF any repair right now.
Frequently Asked Questions
When an appliance is not working in the Greater Toronto Area, the usual culprits are a worn part, a failed motor or pump, a faulty sensor or control board, or normal wear after years of use. Our technician pinpoints the exact cause during the $89 diagnostic and gives you a clear repair quote — most appliance repairs are finished the same day.
Yes. Nick's offers same-day appliance repair across the Greater Toronto Area and the wider GTA, Monday to Saturday 8am–8pm and Sunday 9am–6pm, with no travel surcharge.
As a rule of thumb, repair is worth it when the fix costs less than half the price of a comparable new appliance. Our technician gives you an honest recommendation during the diagnostic so you can decide with no pressure.
In most cases we can book your appliance repair the same day or the next day in the Greater Toronto Area, and the majority of repairs are completed in that single visit.
Clean the dishwasher filter at least once a month if you run the dishwasher daily. If you run fewer than 5 loads per week, every 6 to 8 weeks is sufficient. Households with young children who leave significant food on dishes should clean the filter every 2 to 3 weeks.
In virtually all modern dishwashers, the filter is at the bottom of the tub. After removing the lower rack, look for a cylindrical mesh tube (the upper filter) sitting in a round opening, usually at the rear-centre or rear-left of the tub floor. The flat mesh lower filter surrounds it.
The most common signs are: dishes and glasses coming out with food particles or a gritty film, a bad smell from the dishwasher after a cycle, standing water at the bottom of the tub, and a gurgling or straining sound during draining. Any of these symptoms warrants an immediate filter check.
No — this is a common mistake. The filter needs to be removed and cleaned by hand under running water. Placing it in the dishwasher while it is already dirty does nothing to clean it, and the fine mesh may be damaged by the heat and detergent of a full cycle.
Older dishwashers (pre-2010, especially American brands) used a self-cleaning grinder mechanism instead of a removable filter. These are noisier during operation. If you cannot find a removable filter, your machine likely has a hard food disposer. Check the owner's manual to confirm.
A clogged filter is the single most common cause of poor dishwasher performance. In many cases, cleaning the filter completely resolves cloudy dishes, remaining food particles, and bad odours. If performance is still poor after cleaning the filter, the spray arms may be clogged or the wash pump may need service.
Call a certified technician if: the dishwasher is not draining at all, you see water leaking onto the floor, the door latch is broken, the machine displays error codes, or cleaning the filter and spray arms does not improve performance. Our $89 diagnostic fee is waived when you proceed with repair.