Start with the filter — it's the dirtiest part and the easiest to clean

The mesh or baffle filter traps grease and cooking particles before they reach the fan. It clogs faster than any other part and is where most people see the biggest difference after cleaning. Most range hoods have a filter you can remove by hand or with a straightforward latch — check your manual for the exact release method, because it varies by brand.

Soak the filter in hot water mixed with degreaser for 15 to 20 minutes. Use a commercial kitchen degreaser like Dawn or a dedicated range hood cleaner, or make a paste from baking soda and water. After soaking, scrub both sides with a soft brush or old toothbrush, paying attention to the corners where grease pools. Rinse thoroughly under hot running water until the water runs clear. Let it air-dry completely before reinstalling — a wet filter will drip onto your stovetop.

If your filter is permanently attached or made of charcoal, you cannot soak it. Charcoal filters need replacement every 3 to 6 months depending on use. Mesh filters can be cleaned and reused indefinitely, so the soaking method saves money over time.

Key Takeaways

  • Remove and soak the mesh filter in hot water with degreaser for 15 to 20 minutes, then scrub and rinse until water runs clear.
  • Wipe the interior housing and fan blades with a damp cloth and degreaser, working carefully around electrical parts.
  • Clean the exterior ductwork by disconnecting the vent hose and flushing it with hot water and degreaser, or replacing it if it is heavily caked.
  • Charcoal filters cannot be cleaned and must be replaced every 3 to 6 months; mesh filters can be reused after soaking.
  • Most range hoods need cleaning every 1 to 3 months depending on cooking frequency and the types of food you prepare.

Clean the fan blades and interior housing without damaging wiring

Once the filter is out, you can see the fan blades and the interior walls. These collect grease spray and dust. Mix hot water with degreaser in a spray bottle or bowl. Dampen a cloth — not dripping wet — and wipe each fan blade individually, supporting it gently with your other hand so it does not spin. Work slowly and do not force the blade; if it resists, stop and check for obstructions.

Wipe the interior walls, the motor housing, and any visible wiring with the same damp cloth. Avoid spraying liquid directly onto the motor or electrical connections. If you see heavy buildup in corners, use an old toothbrush dipped in degreaser to loosen it, then wipe with a damp cloth. Let everything air-dry for at least 30 minutes before turning the hood back on.

Disconnect and flush the ductwork if your hood vents outside

The duct that carries air outside accumulates grease inside, especially in the first few feet after the hood. This buildup reduces airflow and can become a fire hazard. If your hood is ducted to the outside (not recirculating), disconnect the vent hose from the hood or the wall — most hoods have a straightforward clamp or screw connection.

Hold the hose over a bathtub or large sink and pour hot water mixed with degreaser through it. Let the mixture sit for 10 minutes, then flush again with plain hot water. If the hose is heavily caked with grease that will not flush out, replacement is cheaper and faster than trying to scrub the inside. Ductwork typically costs $15 to $40 for a standard flexible hose.

Reconnect the hose securely — a loose connection lets grease escape into your walls. If your hood is recirculating (pulling air through a charcoal filter and back into the kitchen), there is no external ductwork to clean, only the filter.

Wipe down the exterior stainless steel or painted surface

The outside of the hood collects fingerprints, dust, and light grease spray. For stainless steel, use a cloth dampened with a 50-50 mix of white vinegar and water, or a commercial stainless steel cleaner. Wipe in the direction of the grain to avoid streaking. For painted or powder-coated hoods, use the same vinegar solution or a mild all-purpose cleaner.

Dry the exterior when ready with a clean cloth to prevent water spots. If your hood has a glass or acrylic panel, use glass cleaner or the vinegar solution and a lint-free cloth.

How often to clean based on your cooking habits

A household that cooks daily with oil or butter should clean the filter every 1 to 2 months. Light cooking or mostly boiling and steaming means you can go 2 to 3 months. Check the filter visually — if you can see grease buildup or the hood sounds louder than usual, it is time to clean.

The interior fan and housing need attention every 3 to 6 months, depending on how much grease spray accumulates. The exterior ductwork should be flushed once a year if you cook frequently, or every 18 months for light use. Charcoal filters in recirculating hoods need replacement on the schedule in your manual, usually every 3 to 6 months.

What to use and what to avoid

Degreaser is the most effective tool — commercial kitchen degreasers like Dawn, Zep, or Krud Kutter work faster than baking soda alone, though baking soda is safer if you have respiratory sensitivity. Avoid bleach, which can damage metal finishes and create toxic fumes when mixed with grease. Do not use abrasive scrubbers on stainless steel, as they leave scratches.

For soaking filters, hot water is essential — cold water will not dissolve grease. If you do not have a commercial degreaser, a paste of baking soda and water works, but it takes longer and requires more scrubbing. Never spray liquid directly into the motor housing or onto electrical connections; always use a damp cloth instead.

Frequently Asked Questions

Can I put the filter in the dishwasher?

Most mesh filters can go in the dishwasher on the top rack, though hand soaking and scrubbing removes grease faster. Check your manual first — some filters have a coating that dishwashers can damage. Charcoal filters should never go in the dishwasher; they are not cleanable and must be replaced.

What if the fan blades won't spin after I clean them?

The blade may be stuck from dried grease. Let it soak in degreaser for 30 minutes, then try again gently. If it still will not move, stop — forcing it can damage the motor. The motor itself may need service, which is a job for an appliance repair technician.

Is it safe to clean the hood while it's plugged in?

No. Always unplug the hood or turn off the circuit breaker before you start cleaning. This prevents accidental set up and protects you from electrical shock if water contacts wiring.

How do I know if my ductwork needs replacement instead of cleaning?

If the hose is cracked, kinked, or has holes, replace it. If grease will not flush out after soaking and flushing, replacement is faster than trying to scrub the inside. Flexible ductwork is inexpensive and takes 10 minutes to swap out.

What's the difference between a ducted and recirculating hood?

A ducted hood vents air outside through a duct and needs ductwork cleaning. A recirculating hood pulls air through a charcoal filter and back into the kitchen — it has no external ductwork, only the filter to replace. Check your manual or look for a duct connection on the back or top of the hood.