Vent cleaning
If your fan vents (rather than just circulates), you need to regularly check the vent that leads from the vent hood to the outside, to make sure that grease isn’t building-up on the inside of it. If it is, contact a vent-cleaning contractor to clean the vent properly. (You may find such a contractor under “chimney sweeps,” or “HVAC duct cleaning,” or “ventilation cleaning” in your telephone book Yellow Pages.)

