If your range hood filter is greasy, clean the metal filter first and check whether your hood also has a charcoal filter. Washable metal filters catch grease. Charcoal filters in ductless hoods handle odor and usually need replacement, not washing.

What to check first

  • Whether the filter is metal mesh, metal baffle, disposable, or charcoal.
  • Whether grease is visible or sticky to the touch.
  • Whether airflow feels weaker than usual.
  • Whether cooking smells linger longer than they used to.
  • Whether the manual says the filter is dishwasher safe.

Clean washable metal filters

  1. Turn the hood off and let the cooktop area cool.
  2. Remove the filters carefully because grease can drip.
  3. Soak them in warm water with mild detergent or degreasing dish soap.
  4. Scrub gently with a non abrasive brush.
  5. Rinse well and let them dry fully.
  6. Reinstall them securely before cooking again.

Broan NuTone recommends soaking grease filters in warm water with mild detergent for 15 to 20 minutes per side. Some filters are dishwasher safe, but the manual should confirm that for your model.

Don't wash charcoal filters

Charcoal filters are common in ductless or recirculating range hoods. They are usually replaced rather than washed. Broan NuTone says non ducted charcoal filter replacement depends on cooking frequency and type, with 3 to 6 months commonly recommended.

Signs the filter is overdue

  • The hood pulls less air than before.
  • Grease is visible on the filter or hood underside.
  • Cooking smells linger longer.
  • Grease drips from the hood.
  • The fan sounds like it is working harder than usual.

Why it matters

A clogged filter reduces airflow and leaves more grease around the cooking area. Cooking is a major home fire source, and grease buildup near heat is not something to let sit indefinitely.

When to call for service

  • The hood fan does not run.
  • Airflow is weak after the filters are clean.
  • Grease is dripping from inside the hood or duct area.
  • The hood makes new grinding, rattling, or electrical sounds.
  • You suspect a duct blockage or unsafe venting.

Good maintenance rhythm

  • Monthly if you cook often: clean washable metal filters.
  • Sooner after heavy frying, searing, wok cooking, or greasy cooking runs.
  • Every 3 to 6 months: replace charcoal filters if your ductless hood uses them, or follow the manual.
  • Any time airflow drops or smells linger: check the filter before blaming the fan.
Add range hood filter cleaning to the Dome mobile app. Monthly kitchen maintenance is easier when the small greasy jobs show up before they get gross.

Sources