The fastest way: soak and scrub in hot soapy water
Most range hood filters come clean in about 30 minutes with hot water, dish soap, and a soft brush. Remove the filter from the hood, fill a bathtub or large sink with hot water and a few squirts of dish soap, drop the filter in, let it soak for 10 to 15 minutes, then scrub both sides with a soft-bristled brush or non-abrasive sponge. Rinse under running water until the water runs clear, shake off excess water, and let it air-dry completely before putting it back.
This method works for aluminum mesh filters, which are the most common type in home kitchens. The mesh is durable enough to handle scrubbing without damage. If your filter is made of paper or has a paper layer, skip the soaking and scrubbing — those need a different approach, covered below.
Key Takeaways
- Aluminum mesh filters soak in hot soapy water for 10 to 15 minutes, then scrub with a soft brush and rinse until water runs clear.
- Paper or pleated filters cannot be washed; they must be replaced when they look gray or clogged, usually every 3 to 6 months depending on cooking frequency.
- Baked-on grease that does not come off with soap and water can be loosened with baking soda paste or a degreaser spray before scrubbing.
- Always let the filter dry completely before reinstalling it, and check your hood's manual for any cleaning restrictions specific to your model.
When hot water and soap are not enough
If grease has baked onto the mesh and does not rinse away, make a paste of baking soda and water, spread it over both sides of the filter, let it sit for 5 to 10 minutes, then scrub and rinse. Baking soda is mildly abrasive and cuts through stubborn grease without scratching aluminum.
For heavier buildup, spray the filter with a commercial degreaser (the kind you would use on stovetops) and let it sit for the time the product recommends — usually 5 to 15 minutes. Then scrub and rinse thoroughly. Wear gloves when using commercial degreasers, and make sure the kitchen is well-ventilated. Never mix degreasers with other cleaners, especially bleach.
Paper and pleated filters: replacement, not cleaning
If your filter is made of paper or has a pleated paper layer, do not wash it. Paper filters trap grease and particles in the material itself, and water will damage them. When the filter looks gray or clogged with dust, it is time to replace it.
Check your range hood's manual or the filter itself for the model number, then order a replacement online or from an appliance parts supplier. Most paper filters cost between $15 and $40. Installation is usually as straightforward as sliding the old one out and the new one in. Paper filters typically last 3 to 6 months in a kitchen that cooks daily; less frequent cooking means longer intervals between replacements.
Drying and reinstalling the filter
After rinsing, shake the filter gently to remove excess water, then stand it upright on a clean towel or drying rack. Let it air-dry for at least 30 minutes, or longer if you have time — moisture left on the filter can drip onto your stovetop or cookware when you turn the hood on. Do not use a hair dryer or place it near a heat source; the mesh can warp.
Once completely dry, slide the filter back into the hood in the same direction it came out. Most filters have a frame that sits in a slot or clips that hold it in place. Make sure it is seated firmly so air flows through it properly and grease does not bypass the filter and coat the hood's interior.
How often to clean or replace
The frequency depends on how much you cook and what you cook. A household that uses the stove daily for frying or sautéing should clean aluminum filters every 2 to 4 weeks. Light cooking — mostly boiling and baking — means you can go 6 to 8 weeks between cleanings. Paper filters need replacement on a similar schedule, but you will notice them clogging faster because they cannot be cleaned.
A straightforward way to know when it is time: hold the filter up to a light. If you cannot see light through the mesh clearly, it is clogged enough to clean. If it is paper and looks gray or dark, replace it.
Preventing heavy buildup
Run the hood while you cook, not after. The filter traps grease best when air is moving through it during cooking. Turn it on a few minutes before you start and leave it running for 5 to 10 minutes after you finish.
Wipe down the stovetop and cookware before they cool. Warm grease is easier to wipe away than cold, hardened grease, and less of it will end up on the filter. If you fry regularly, you will need to clean the filter more often — that is normal and not a sign anything is wrong with the hood.
Frequently Asked Questions
Can I put an aluminum mesh filter in the dishwasher?
Most aluminum filters can go in the dishwasher on a normal cycle, but hand washing with a brush is faster and uses less water. If you use the dishwasher, place the filter on the top rack and remove it before the heat-dry cycle, since high heat can warp the frame. Check your hood's manual first — some manufacturers warn against dishwashers.
What if the filter is damaged or has holes in the mesh?
A small hole or dent does not affect performance much, but a large hole or tear means grease will bypass the filter and coat the hood's interior. If the damage is minor, you can keep using it until you have time to replace it. If the frame is bent or the mesh is torn in multiple places, replacement is cheaper than cleaning the hood interior later.
Is it safe to run the hood without a filter?
No. Without a filter, grease goes straight into the hood's ductwork and fan, where it builds up and becomes a fire hazard. It also makes the fan work harder and wear out faster. Always reinstall the filter before using the hood, even if you are waiting for a replacement to arrive.
Can I use vinegar or lemon juice to clean the filter?
Vinegar and lemon juice are mild acids that can help cut grease, but they work slower than hot soapy water or baking soda paste. You can add a cup of vinegar to the soaking water if you want, but soap is more effective. Save vinegar for wiping down the hood's exterior.