How to Clean a Range Hood Filter (Easy, At-Home Method)

Don’t rush out to buy a new range hood filter just because it’s looking greasy. With a few household supplies and a little elbow grease, you can get that filter sparkling clean again — and save yourself the cost of a replacement.

Is your stove top range filter looking greasy and dirty? It’s time to give it a thorough cleaning! Here are a few tried-and-true ways to get it looking brand new again.

Why Range Hood Filters Get So Greasy

Every time you fry, sauté, or simmer something on the stove, tiny airborne grease particles rise with the steam. Your range hood filter is designed to catch that grease before it settles on your cabinets and ceiling. Over time, it builds up a thick, sticky film. That buildup doesn’t just look bad — it also blocks airflow, forces your exhaust fan to work harder, and can even become a fire hazard if it’s left unchecked for too long. The good news is that this buildup is easy to remove with a few basic supplies you probably already have at home.

Our Favorite Method: Warm Water and Water Softener

This is the method featured in our video, and it’s hands-down the easiest one we’ve tried. All you need is warm water, half a cup of water softener, and an old toothbrush.

1. Fill your sink (or a container large enough to hold the filter) with warm water.
2. Add half a cup of water softener and stir until it’s fully dissolved.
3. Submerge the filter and let it sit for a few minutes.
4. Gently scrub with an old toothbrush.

The grease lifts off easily, and the filter comes out looking brilliant.

Alternative Method: Soap, Soak, and Scrub

If you don’t have water softener on hand, dish soap works well too.

1. Remove the filter. Locate it under your range hood — depending on your model, you may need to lift the hood or unscrew a panel to access it.
2. Check the manufacturer’s instructions. Most filters can be cleaned safely at home, but it’s worth confirming there aren’t specific care instructions for your model.
3. Pre-soak in warm, soapy water. Fill a sink or basin with warm water and a few drops of dish soap. Submerge the filter and let it soak for 15–20 minutes to loosen grease and grime.
4. Scrub with a brush. Use a soft-bristle brush or an old toothbrush to work on stubborn spots. Scrub gently so you don’t damage the filter’s mesh or coating.
5. Rinse thoroughly. Run the filter under water until every trace of soap and grease is gone.
6. Dry completely. Shake off the excess water and lay the filter on a towel or drying rack. Let it air-dry fully before putting it back — trapped moisture can cause problems down the line.

A Few Extra Tips Before You Start

• Wear rubber gloves. Grease and grime can be tough on your skin.
• Use hot water, not boiling. Boiling water can warp some filter materials.
• Skip the dishwasher unless your manual says it’s safe. Aluminum mesh filters can discolor or warp.
• Let it dry completely before reinstalling. A damp filter can trap moisture near your stove’s electrical components.

How Often Should You Clean It?

Most kitchens need a filter cleaning once a month. If you cook daily, especially with a lot of frying, aim for every two to three weeks instead. A quick way to check is to hold the filter up to the light. If you can’t see light passing through the mesh, it’s overdue for a wash.

Keep Up With Regular Maintenance

Clean your range hood filter at least once a month, or more often if you cook frequently. Staying on top of it prevents heavy grease buildup, keeps your kitchen’s air quality in check, and lowers the risk of a grease fire.

A clean filter isn’t just about looks — it’s an easy habit that keeps your kitchen safer and your range hood working the way it should. With just a few minutes of maintenance each month, you’ll extend its life and avoid an unnecessary trip to buy a replacement.