How to Clean an Exhaust Hood Filter: A Complete, Practical Guide

Cleaning the exhaust hood filter is one of the most effective things you can do to keep your kitchen safe, odor-free, and efficient. A clogged filter reduces airflow, increases grease buildup in ductwork, and can cause unpleasant kitchen odors that travel to other appliances. This guide covers types of filters, supplies, step-by-step cleaning methods (including natural options), safety considerations, and ongoing maintenance. You'll also find tips to pair this task with broader tasks such as kitchen cabinet declutter and efforts to remove fridge odor.

Why cleaning the hood filter matters

• Restores proper ventilation and reduces smoke and steam when cooking.
• Reduces fire risk by removing flammable grease buildup.
• Improves kitchen air quality and helps eliminate lingering smells, which complements efforts to remove fridge odor and keep the whole kitchen fresher.
• Extends the life of the range hood motor and ductwork.

Know your filter type

• Mesh filters (aluminum or stainless): Common in many domestic hoods; washable and reusable.
• Baffle filters (stainless steel): Durable and effective for trapping grease; also washable.
• Charcoal/activated-carbon filters: Found in ductless recirculating hoods; not washable—replace on schedule.
• Disposable paper-type filters: Replace per manufacturer instructions.

Supplies you'll need

• Rubber gloves and safety glasses
• Dish soap (preferably a grease-cutting brand) or a dedicated degreaser
• Baking soda and white vinegar (for natural cleaning options)
• Large basin, sink, or plastic tub for soaking
• Non-abrasive scrub brush or old toothbrush
• Microfiber cloths or lint-free towels
• Optional: commercial heavy-duty degreaser (for baked-on grease)

When to clean

• Mesh/baffle filters: Every 1–3 months for typical home cooking; more often if you fry frequently.
• Charcoal filters: Replace every 3–6 months or as recommended by the manufacturer.
• Disposable filters: Replace per packaging instructions.

Step-by-step: Hand-soak method (best for thorough cleaning)

• Turn off the hood and, if possible, disconnect power at the breaker for safety.
• Remove the filter(s) according to the manufacturer's instructions. Note how they sit so reinstallation is straightforward.
• Fill a basin or sink with very hot water. Add 1/4–1/2 cup dish soap and 1/2 cup baking soda for each basin of water.
• Submerge the filter and let it soak for 15–30 minutes. For heavy grease, let soak up to 1 hour. The baking soda helps break down grease while soap emulsifies oils.
• Use a non-abrasive brush to agitate the mesh or baffle, concentrating on crevices. An old toothbrush is excellent for corners and edges.
• Rinse thoroughly with hot water until suds and loosened grease are gone.
• Dry completely with a towel and then air-dry upright to ensure no moisture remains before reinstalling.
• Reconnect power and reinstall the filters, ensuring they click or latch securely.

Dishwasher method: when and how to use it

The dishwasher can be used for many mesh and stainless filters, but it may not remove heavy, baked-on grease. To use this method:

• Pre-soak the filters in hot, soapy water for 15–30 minutes to loosen grease.
• Place filters on the top rack or angled so they don't interfere with spray arms. Use the hottest cycle with an extra rinse.
• Inspect after the cycle. If grease remains, repeat hand-soak and scrub as needed.

Natural degreasing alternative: vinegar + baking soda

For a chemical-free approach, use hot water, baking soda, and white vinegar:

• Pre-soak filters in hot water with 1/2 cup baking soda.
• Add 1–2 cups of white vinegar. The fizzing action helps lift grease; let soak for 15–30 minutes.
• Scrub lightly, rinse, and dry completely. This method works well and aligns with broader kitchen care—use similar natural solutions to clean stainless appliances naturally to maintain finishes without harsh chemicals.

Deeply baked-on grease: stronger cleaning safely

For stubborn, carbonized grease:

• Use a commercial degreaser labeled safe for the filter material, working in a ventilated area and following product instructions.
• Wear gloves and eye protection. Apply degreaser, allow recommended dwell time, then scrub and rinse thoroughly.
• Avoid abrasive scouring pads on stainless finishes to prevent scratching.

Drying and reassembly

• Dry filters completely to prevent mildew—use a towel and then air-dry for 30–60 minutes.
• Check the hood interior for grease puddles and wipe with a degreaser or hot soapy water; dry the surface.
• Reinstall filters securely and test the fan at high speed for a few minutes to ensure proper operation.

Quick checklist: remove power, remove filters, pre-soak in hot soapy water (add baking soda), scrub, rinse, dry completely, reinstall. Replace non-washable charcoal filters as recommended.

Ongoing maintenance and prevention

• Run the hood fan during and for 10–15 minutes after cooking to reduce grease settling and odors.
• Wipe the exterior weekly—use a microfiber cloth and a mild cleaner or a vinegar/olive oil mix to clean stainless finishes; this helps you clean stainless appliances naturally without streaks.
• When you do a kitchen cabinet declutter, keep a small maintenance kit near the hood: rubber gloves, a scrub brush, and replacement charcoal filters. That way you’ll remember filter checks when organizing.
• Inspect the filter and hood interior monthly for visible buildup; cleaning is easier and more effective when done regularly.
• Address other odor sources—clean drip pans, empty and clean the fridge regularly, and use a box of baking soda or activated charcoal to remove fridge odor.

When to call a professional

If the hood motor sounds strained, airflow remains weak after filters are clean, or ductwork is inaccessible and heavily greasy, schedule a professional inspection and duct cleaning. Professionals can safely remove built-up grease in ducts, reducing fire risk and improving system efficiency.

Keeping your exhaust hood filter clean is a small investment of time that pays dividends in safety, efficiency, and overall kitchen freshness. Pair regular filter maintenance with broader cleaning habits, and your kitchen will be healthier and more pleasant to use.

More tips in the section Kitchen Cleaning & Organization