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As a general rule of thumb, clean your fans whenever you tidy up the home. Fans benefit greatly from a light weekly cleaning and a deep cleaning at the start of each season. If it’s been a while since you touched up the fans with oscillating blades, start with the deep cleaning before moving on to the lighter touch-ups. If you’re unsure when to clean fans and other parts of the home, learn how often you should clean your home.

You should generally avoid using WD-40 on a ceiling fan. While it might quiet a squeak temporarily, it is primarily an anti-corrosion and water displacement agent, not a true lubricant, and can damage the fan's components over time. Most modern ceiling fans have sealed bearings and do not require oiling, so a squeak may indicate another issue. For fans that do require lubrication, it is better to use a light machine oil, 30-weight motor oil, or a lubricant specifically designed for ceiling fans.

Keeping dust off fans can keep them working optimally and help keep dust mites or bacteria from building up. Dust fans weekly with a duster, microfiber cloth, old pillowcase, or vacuum attachment. You can also try spraying a clean fan with a store-bought dust-repellent product or making a DIY dust-repellent with water and a small amount of liquid fabric softener mixed in.

Most duct booster fans are not designed to run continuously, though some models can be programmed for constant operation. Typically, they are controlled by the user via a switch, controls on the unit itself, or by being wired to the HVAC system's thermostat. Wiring the fan to a thermostat allows it to run automatically only when heating or cooling is active, which saves energy and is an effective way to activate the fan only when needed to address issues like uneven room temperatures.