How to Clean or Replace a Range Hood Filter

Your range hood filter is doing heavy lifting every time you cook—trapping grease, smoke, and odors before they settle on your cabinets and walls. A clean filter isn't just about keeping your kitchen fresh; it's about airflow and safety. When that filter gets clogged, your hood stops working, moisture builds up, and you're creating conditions for grease fires. Most home cooks never think about their filter until the kitchen fills with smoke. The good news: cleaning takes fifteen minutes, and replacement takes five. Knowing which one you need—cleaning or replacing—and doing it right keeps your hood performing and your kitchen safe.

1. Know What You're Cleaning. Turn off your range hood and locate the filter. Most hoods have either a flat aluminum mesh filter (the rectangular accordion-style screen), a baffle filter (curved metal channels), or a charcoal cartridge (usually cylindrical, found in ductless hoods). Check your hood's manual or look at the filter itself—the shape tells you everything. Flat mesh filters are cleanable. Baffle filters are cleanable. Charcoal cartridges must be replaced, never cleaned.
2. Release and Extract Safely. Most filters slide out or lift straight down. Locate the release buttons or latches on either side of the filter (usually near the front edge) and press or slide them. If you don't see latches, try lifting the front edge up first, then sliding toward you. Some filters hang from clips—release those before pulling. Set the filter down on a towel or newspaper; it will drip.
3. Spot Damage Before Cleaning. Hold the filter up to the light and look through the mesh or baffle channels. You're checking for tears, punctures, or areas where the mesh has separated from the frame. Also look at the edges—if the frame is bent or warped, the filter won't seal properly in the hood and air will bypass it. If you see damage, the filter needs replacement, not cleaning.
4. Mix Your Grease-Busting Soak. Fill a bathtub, large sink, or plastic storage tub with hot water—as hot as you can stand to touch for a few seconds. Add a generous squirt of degreasing dish soap or all-purpose degreaser. If you have heavy buildup, add a half-cup of baking soda to the water; it helps break down caked grease. Let the water cool just enough that you can work in it without burning yourself. The hotter the water, the better the grease dissolves.
5. Let Chemistry Do the Work. Submerge the filter completely in the hot soapy water. Let it sit for 15 to 30 minutes, depending on how thick the grease buildup is. If the filter is heavily caked, let it soak for the full half hour. The hot water and soap will soften the grease. You can gently agitate it after 10 minutes—don't scrub yet, just move it around a little.
6. Scrub With the Grain. Use a soft-bristled brush, an old toothbrush, or a non-abrasive sponge to gently brush both sides of the filter. Work along the direction of the mesh or baffle channels, not against them. For mesh filters, brush in one direction so you're pushing grease out through the holes rather than driving it deeper. For baffle filters, scrub each channel. Don't use steel wool or abrasive scouring pads—they'll damage the aluminum. Rinse under running water as you scrub to flush away loosened grease.
7. Flush Until Crystal Clear. Hold the filter under running hot water and rinse both sides completely. Tilt it and rotate it so water flows through every part of the mesh or channels. Keep rinsing until the water running off is completely clear and soapy. This usually takes 2 to 3 minutes. Any soap residue left behind will affect airflow and create odor, so take your time here.
8. Dry Completely Before Reinstalling. Shake off excess water over the sink, then stand the filter upright or lay it flat on a towel or drying rack. Let it air dry for at least 30 minutes before reinstalling. If you're in a hurry, you can pat it down with clean towels and reinstall it damp, but dry is better—a wet filter loses efficiency and can drip onto your stovetop. If you have a clean, lint-free cloth, you can hand-dry it faster.
9. Seat and Lock It Down. Slide or lift the filter back into the hood, making sure it seats fully in its frame. You should hear or feel a click when the latches engage, or feel the filter settle into place. Make sure the filter is oriented the same way it came out—usually with the frame facing outward and the mesh or baffle side facing inward toward the fan. If it doesn't slide smoothly, pull it out and check the orientation.
10. Verify Strong Airflow. Turn on the range hood and listen for normal fan noise. The airflow should feel strong—hold your hand near the front of the hood and feel the pull. If the hood seems weaker than before, or if you hear rattling, turn it off and remove the filter to check that it's seated correctly. A properly reinstalled filter should feel like it's barely there—just normal hood operation.
11. Decide: Clean or Replace. If cleaning has restored the hood to strong airflow and the filter shows no damage, you're done for this cycle. Most mesh and baffle filters last 1 to 2 years with regular monthly cleaning. If the filter is torn, warped, or cleaning doesn't restore airflow, or if you notice grease is accumulating faster than it used to, replace it. Charcoal cartridge filters (in ductless hoods) typically need replacement every 3 to 6 months regardless of appearance—they can look clean but stop absorbing odor.
12. Install Fresh Filter Fast. Order the exact replacement for your hood—check the manual or take a photo of your old filter to the hardware store. Most range hood filters cost $20 to $80 depending on the hood type. Unbox it, slide it into the hood the same way the old one came out, and make sure the latches engage. For charcoal cartridges, drop them straight into their housing and turn the retaining clip if there is one. Run the hood for 30 seconds to make sure everything sounds normal.