Clean your range hood filters by soaking them in hot soapy water, scrubbing away grease buildup, and rinsing thoroughly before reinstalling

Most range hood filters trap grease and cooking particles as air moves through them. Over time, this buildup reduces airflow and makes your hood less effective. Cleaning takes about 30 minutes of hands-on time, though soaking does most of the work for you. You can do this monthly or whenever you notice the filter looking dark or greasy.

The process is the same whether your hood has a mesh filter (the flat metal screen type) or an aluminum baffle filter (the ridged kind with overlapping sections). Both handle hot water and dish soap without damage. If your hood has a charcoal filter—a dark, spongy cartridge—that one cannot be cleaned and must be replaced instead, usually every 6 to 12 months depending on cooking frequency.

Key Takeaways

  • Turn off the range hood and let it cool for 5 minutes before removing the filter to avoid burns from hot surfaces.
  • Soak the filter in a bathtub or large sink filled with hot water and dish soap for 15 to 20 minutes to loosen grease.
  • Scrub both sides of the filter with a soft brush or sponge, paying extra attention to corners and ridges where grease collects.
  • Rinse under running water until the water runs clear, then shake out excess water and let the filter air-dry before reinstalling.
  • If grease is baked on hard, soak longer or use a degreaser product designed for kitchen use instead of plain dish soap.

Turn off the hood and remove the filter safely

Switch off the range hood at the control panel or wall switch. Let it run for 30 seconds after you turn it off to clear any remaining air, then wait 5 minutes for the motor and any heated surfaces to cool. A hot filter can burn your hands and the heat makes grease harder to remove.

Most filters slide or clip into place. Look for a release button or lever on the side of the filter frame—push or pull it while sliding the filter straight out toward you. Some filters straightforward rest in a slot and lift straight up. If yours is stuck, do not force it; check the manual or look for a hidden clip you may have missed. Once removed, set the filter on a clean surface away from your cooking area.

Fill a tub with hot water and dish soap

Use a bathtub, large utility sink, or a plastic storage tub big enough to lay the filter flat. Fill it with hot water—as hot as you can get from the tap, around 120°F (49°C). Add 2 to 3 tablespoons of grease-cutting dish soap (the kind you use for washing dishes, not laundry detergent). Stir the water to mix the soap throughout.

If you do not have access to a bathtub, a large roasting pan or even a kitchen sink works if your filter is small enough to fit. The goal is to submerge the entire filter so grease can loosen evenly. If the filter is too large, you can soak it in sections by tilting it or soaking one side at a time.

Soak the filter for 15 to 20 minutes

Place the filter flat in the soapy water. The hot water and soap begin breaking down the grease coating when ready. Let it sit undisturbed for 15 to 20 minutes. If the filter has heavy buildup—thick, dark grease that looks baked on—soak for 30 minutes instead, or use a commercial kitchen degreaser mixed into the water according to the product label.

While the filter soaks, wipe down the inside of the hood with a damp cloth to remove loose dust and grease splatters. This keeps debris from falling back onto the filter when you reinstall it. You can also clean the hood's light fixture and vents at this time.

Scrub both sides of the filter thoroughly

After soaking, the grease should be soft enough to remove by hand. Use a soft-bristled brush, a non-abrasive sponge, or an old toothbrush to scrub both the top and bottom surfaces of the filter. Pay special attention to the corners, edges, and any ridges or grooves where grease collects. For baffle filters, scrub between the overlapping sections where grease hides.

Do not use a steel wool pad or stiff wire brush—these can damage the filter material and create sharp edges. If grease is still stuck after scrubbing, soak the filter for another 10 minutes and try again. A plastic scraper or old credit card can help dislodge stubborn spots without scratching the metal.

Rinse and dry the filter completely

Hold the filter under running tap water and rinse both sides until the water runs clear with no soapy residue. Tilt and angle the filter so water flows through all the grooves and sections. This usually takes 1 to 2 minutes. If water still looks cloudy or soapy, keep rinsing—soap left on the filter can affect airflow and smell when the hood heats up.

Shake the filter gently over the sink to remove excess water, then stand it upright or lay it flat on a clean towel to air-dry for at least 30 minutes before reinstalling. You can speed drying by placing it in front of a fan or in a warm, dry room. Do not use a hair dryer or oven—the heat can warp the filter frame. Once dry, slide the filter back into the hood until you hear or feel it click or seat fully into place.

When to replace instead of clean

If your filter has holes, dents, or bent sections that affect how it sits in the hood, replacement is safer than cleaning. A damaged filter cannot seal properly and grease will bypass it and coat the motor. Most mesh and baffle filters cost $15 to $40 and are available at appliance stores, home improvement retailers, or online—check your hood's model number to order the correct size.

Charcoal filters, which absorb odors in ductless hoods, cannot be cleaned at all and must be replaced on schedule. Check your hood's manual for the recommended replacement interval, which is usually every 6 to 12 months depending on how often you cook. Some people replace them more frequently if they notice cooking smells lingering in the kitchen.

Frequently Asked Questions

Can I put the filter in the dishwasher?

Most mesh and baffle filters can go in the dishwasher on a normal or heavy cycle, though hand-soaking is gentler and uses less water. Check your hood's manual first—some manufacturers warn against dishwashers because high heat can warp the frame or damage any rubber seals. If you do use the dishwasher, place the filter on the top rack and skip the heated dry cycle.

What if the filter still looks dark after cleaning?

Some discoloration is normal and does not affect performance. If the filter is clean to the touch and water runs through it freely, it is working fine. If grease still feels sticky or buildup is thick, soak longer or use a commercial degreaser. Repeat cleaning every two weeks instead of monthly if your filter darkens quickly.

How often should I clean the filter?

Clean your filter once a month if you cook daily, or every two months if you cook a few times a week. If you notice the hood is not pulling steam or smells are lingering, clean it sooner. Heavy cooking—frying, grilling, or cooking for large groups—may require cleaning every two weeks.

Is it safe to use oven cleaner on the filter?

No. Oven cleaner is caustic and can damage the filter material and your skin. Stick to dish soap, hot water, and commercial kitchen degreasers labeled safe for food-contact surfaces. If you use a degreaser, rinse the filter extra thoroughly to remove all residue before reinstalling.

What happens if I run the hood with a wet filter?

Water dripping from a wet filter can damage the motor or electrical components. Always let the filter air-dry completely—at least 30 minutes—before reinstalling. If you accidentally reinstall a damp filter, turn off the hood when ready and let it dry for several hours before running it again.