How to Clean a Bathroom Fan

When’s the last time you looked up while scrubbing your bathroom? We all know it's important to clean the bathroom fan but, if you're like me, you’re probably accustomed to focusing your efforts on sink tops, drains and toilet bowl stains. As a result, the bathroom ventillation fan is often neglected.

Why Are Bathroom Vent Fans So Dirty?

Bathroom HVAC works hard. From managing moisture levels to dispelling odors, your fan is designed to move a lot of air every day (and depending on the size of your household, multiple times a day). Within that air, the fan also moves a lot of dust.

Airborne dust tends to settle on all surfaces throughout your home, but in the bathroom, it hits differently. Any fan can circulate the dust, and because the bathroom exhaust fan system is designed to extract moisture and odors to the outside of the home, dust is quick to gather on (and inside) the fan itself.

If you’re not already in the habit of focusing on how to clean a bathroom ceiling fan two or three times a year, check for signs that dust is causing issues. Not only can it cause operational problems, but extra effort could cause the system to overheat or drive up your energy bills.

Signs that your fan needs maintenance include:

• Excessive noise. Dust buildup strains the fan’s motor, causing the entire system to make more noise when it’s running.
• Poor operation. You might begin to notice that the bathroom doesn’t ventilate well. Weak airflow means your mirrors stay foggy for longer than usual, odors linger, and you might even notice mold growth in areas that stay damp.
• Discoloration and visible dust. If you can see the dust, take action.

If you’ve never cleaned the bathroom ceiling fan, you might be shortening its lifespan. A good fan should last decades, but without maintenance, yours might run loud and function poorly over time.

How to Clean Your Bathroom Exhaust Fan

1. Turn off the power. Switch off the fan at the wall and, if possible, the breaker. Safety first!
2. Dust the surface. Use a microfiber cloth to dust off the outer cover. If there’s a lot of visible buildup, you might use the wand of your vacuum with a brush attachment.
3. Remove the fan’s cover. Most fan covers are spring-loaded, so gently pull down on it, and it’ll release from the box in the ceiling.
4. Wash the cover and let it dry. Dish soap and water get the job done! Use a soft brush if needed to remove layers of dust and grime.
5. Clean the fan blades, housing and motor. Use a vacuum with a brush attachment or a dry cloth to clean the visible surfaces and inner workings of your exhaust fan box.
6. Inspect the duct. If you had heavy dust buildup on the surfaces of the fan, you might also find clogs or debris inside the vent. Use a vacuum hose to clear what you can reach.
7. Reattach the cover. Once it’s dry and the system is clean, snap the cover back into place.
8. Restore power to the fan. Turn the breaker back on and let the fan run for a few minutes. Listen for anything that sounds different; if there’s rattling, it could be that the cover isn’t set properly. If you disassembled any internal components, noises could also signal loose screws or poor re-assembly.

How Often Should I Clean the Bathroom Exhaust Fan?

Every six months is often enough for homes, but if your fan runs often or it happens to be a hard-working bathroom, clean it more often. Keeping the fan clean can extend the life of the system.

Is a Dirty Exhaust Fan Less Energy Efficient?

It sure is! If your fan has to work harder or run for longer to ventilate the bathroom, you’re definitely going to be spending more on electricity. Cleaning the system keeps it running as efficiently as possible.