How to Clean a Range Hood Filter

The range hood sits over your stove and sucks up cooking fumes. The filter inside catches grease, smoke particles, and whatever else floats up from your pans. Over time, that filter gets caked with buildup until it can’t do its job. The result? Grease goes into your ductwork, your kitchen stays smoky, and eventually you’ve got a fire hazard above your stove.

Why This Matters

A clogged range hood filter is more than just dirty:

• Reduced airflow – Fan can’t pull air through effectively
• Grease in ductwork – What the filter doesn’t catch goes into the ducts
• Fire hazard – Grease buildup is highly flammable
• Odors – Old grease smells bad when heated
• Fan strain – Motor works harder against clogged filter
• Poor ventilation – Smoke and steam stay in the kitchen

Cleaning the filter takes twenty minutes. Replacing ductwork or fixing a grease fire takes a lot longer.

Types of Filters

Metal Mesh Filters

Most common in residential hoods. Aluminum or stainless steel mesh layers catch grease. These are designed to be cleaned and reused.

Charcoal Filters

Used in ductless hoods that recirculate air. These absorb odors but can’t be cleaned—they must be replaced periodically.

Baffle Filters

Commercial-style metal filters with channels that force air to change direction, causing grease to condense out. More effective and easier to clean.

Cleaning Metal Mesh Filters

Step 1: Remove the Filter

1. Turn off the range hood
2. Locate the filter underneath (usually one to three)
3. Most slide or pop out from a slot or latch system
4. Some have a tab or button to release
5. Set it on a surface you don’t mind getting greasy

Step 2: Assess the Situation

Hold the filter up to light:

• If you can see through it easily, it just needs routine cleaning
• If it’s completely blocked, you’ve waited too long
• If the mesh is damaged or falling apart, replace it

Step 3: Prepare Your Cleaning Solution

Fill a sink or large container with:

• Hot water (as hot as you can stand)
• Generous amount of dish soap (cuts grease)
• 1/2 cup baking soda (adds scrubbing power)

Step 4: Soak the Filter

1. Submerge the filter completely
2. Let soak for 10-15 minutes
3. Longer for heavy buildup
4. The hot water and soap will start breaking down the grease

Step 5: Scrub

1. Use an old toothbrush or scrub brush
2. Work over both sides of the filter
3. Get into all the crevices and mesh layers
4. Don’t be gentle—these are built to take it
5. For stubborn spots, make a paste of baking soda and water and scrub

Step 6: Rinse Thoroughly

1. Run under hot water
2. Flush from both sides
3. Make sure all soap and loosened grease is gone
4. Shake off excess water

Step 7: Dry Completely

1. Pat with paper towels
2. Let air dry fully before reinstalling
3. This prevents mold and ensures proper operation
4. Usually takes 15-30 minutes

Step 8: Clean the Housing

While the filter is out:

1. Wipe the inside of the hood where the filter sits
2. Remove any visible grease buildup
3. Check the fan blades if accessible
4. Wipe the underside of the hood

Step 9: Reinstall

Slide or snap the filter back into place. Make sure it’s secure.

Charcoal Filters (Ductless Hoods)

These can’t be cleaned. Replace them:

• Every 3-6 months with regular use
• When odors become noticeable
• When airflow seems reduced

Check your hood’s manual for the correct replacement filter.

How Often to Clean

• Daily cooking: Monthly
• Several times a week: Every 2-3 months
• Occasional cooking: Every 4-6 months
• Heavy frying or greasy cooking: More frequently

The light test is your guide—if you can’t see through it, clean it.

Signs Your Filter Needs Attention

• Visible grease buildup
• Can’t see light through the mesh
• Reduced suction when the fan is on
• Odors when cooking
• Grease dripping from the filter
• Fan is louder than it used to be

DIY vs. Call a Pro

DIY: All filter cleaning and replacement, hood surface cleaning.

Call a pro: Duct cleaning, fan motor issues, electrical problems, or installation of new range hood. Find an appliance repair service →

The Bottom Line

Your range hood filter is the barrier between your cooking and your ductwork. Keep it clean and grease stays out of places it shouldn’t be. Ignore it and you’re building a fire hazard above your stove. Twenty minutes once a month is all it takes.