How to Clean Kitchen Exhaust Fan Blades — Toronto Home Guide

Kitchen exhaust fan blades and filters trap grease vapour every time you cook. That grease accumulates into thick, sticky layers that reduce suction performance and become a fire hazard if left for months. Cleaning every 1–3 months depending on how often you cook is sufficient for most households.

Mesh Filters (Range Hood)

Most range hoods have removable metal mesh filters that catch grease before it reaches the fan mechanism:

1. Remove the filters — they typically slide or pop out from underneath the hood
2. Fill a large pot or the kitchen sink with very hot water and a generous squirt of dish soap
3. Add ¼ cup of baking soda — it cuts grease far more effectively than soap alone
4. Submerge the filters and let soak for 15–30 minutes
5. Scrub with a stiff brush to remove loosened grease, paying attention to the mesh cavities
6. Rinse thoroughly and allow to dry completely before reinstalling — damp metal filters can cause odours

Fan Blades

If grease has passed through the filters and reached the fan blades:

1. Turn off and unplug the fan at the circuit breaker if hardwired, or unplug if plug-in
2. Access the fan housing — this varies by model; most have a removable cover after the filter is taken out
3. Mix dish soap with hot water and use a cloth or brush to wipe each blade
4. For thick buildup, apply a paste of baking soda and a few drops of dish soap directly to the blades, let sit 10 minutes, then scrub off
5. Wipe clean with a damp cloth and dry thoroughly before reassembling

Hood Exterior

• Stainless steel hoods: wipe with a cloth dampened in a mix of dish soap and water, then follow with a dry cloth in the direction of the grain
• Avoid abrasive scrubbers on stainless steel — they leave permanent scratches
• For grease splatter on the hood exterior, a commercial degreaser or the dish soap and baking soda method both work

How Often

• Filter cleaning: every 1–2 months if you cook daily; every 3 months for light cooking
• Fan blades: once or twice a year is usually sufficient if filters are cleaned regularly
• Hood exterior: wipe down monthly alongside other kitchen surfaces