Quick answer: Turn off the power first, then remove the cover and soak it in warm soapy water with a little white vinegar or baking soda for stubborn grease. Vacuum loose dust from the fan blades and interior, wipe them down with a damp cloth, and clean or replace the filter according to your model. Let everything dry fully before reassembling.
Extractor fans work quietly in the background of kitchens and bathrooms, pulling moisture, smoke, and odours out of the air, right up until they get so clogged with grease or dust that they can barely do the job at all. A clogged fan doesn’t just underperform either; built-up grease is a genuine fire hazard in a kitchen setting, which makes regular cleaning more than just a tidiness job.
Signs Your Extractor Fan Needs Cleaning
- Reduced extraction, with steam, smoke, or moisture lingering longer than it used to
- An unusually loud or rattling fan, which can indicate dirt or grease weighing down the blades
- Visible dust or grease build-up on the exterior grille
- Persistent musty or cooking smells that don’t clear after use
Safety First
Always turn off the power to the extractor fan before cleaning, disconnecting it from the mains or the relevant switch. This applies whether you’re cleaning a bathroom fan or a kitchen cooker hood.
What You Will Need
- A vacuum cleaner with a brush attachment
- Warm water and mild washing-up liquid, or a degreaser for kitchen fans
- White vinegar or bicarbonate of soda
- An old toothbrush or small brush
- A microfibre cloth
- A screwdriver
Step 1: Remove the Cover
Most extractor fans have a cover or grille that lifts, clips, or unscrews away from the main unit. Check your model’s user guide if you’re unsure how yours releases, since removing it forcefully can crack the plastic.
Step 2: Vacuum Loose Dust and Debris
With the cover off, use a vacuum fitted with a brush attachment to remove loose dust and fluff from the fan blades and the interior housing. This first pass makes the next wet-cleaning step far less messy.
Step 3: Soak the Cover
- Submerge the cover in warm water with a squirt of washing-up liquid.
- For a kitchen cooker hood cover with heavier grease, add a cup of white vinegar or a tablespoon of baking soda to the water.
- Leave it to soak for ten to fifteen minutes to loosen grime.
- Scrub with a non-abrasive sponge, then rinse thoroughly and leave to air dry completely before refitting.
Step 4: Clean the Fan Blades and Interior
If your fan’s blades or motor unit can be removed, check the manufacturer’s guide first, since not every model allows this.
- If removable, take out the fan blades with a screwdriver, noting which direction they face before removing them, since they are directional and need to go back the same way.
- Soak removable blades in warm soapy water, or run them through a dishwasher only if your user guide confirms this is safe.
- If the blades can’t be removed, use a damp cloth or a soft-bristled toothbrush to wipe them clean in place, testing on a small area first to check it doesn’t scratch the surface.
- Wipe the interior housing with a cloth dampened in warm, soapy water, or a diluted vinegar solution for a natural degreasing option.
Step 5: Deal With the Filter
Filters vary significantly depending on your extractor type, so check your user guide for specifics.
- Metal grease filters (common in kitchen cooker hoods) can usually go in the dishwasher, or be soaked and scrubbed by hand.
- Charcoal or paper filters (found in recirculating cooker hoods) are not designed to be cleaned. These need replacing entirely once they’ve reached the end of their life, since attempting to wash them ruins their filtering ability.
Step 6: Reassemble and Test
- Once every part is completely dry, reassemble the fan in reverse order, making sure the fan blades face the correct direction if you removed them.
- Refit the cover securely, checking clips or screws are properly engaged.
- Restore power and test the fan to confirm it runs smoothly and quietly.
If the fan sounds unusually loud or off after cleaning, double-check that everything, particularly the blades, has been reassembled correctly and is properly balanced.
Cleaning the Exterior
While the outside of a cooker hood doesn’t affect performance, keeping it free of grime keeps your kitchen looking its best. Wipe the exterior casing with a cloth and a mild degreaser or diluted vinegar solution, buffing dry afterwards for a streak-free finish, particularly on stainless steel models.
Kitchen vs Bathroom Extractor Fans
The cleaning process is broadly the same for both, though the focus differs slightly. Kitchen extractors deal mainly with grease, which needs a proper degreasing soak rather than just a wipe, while bathroom extractors deal mostly with dust, lint, and the moisture that encourages mould, so the emphasis is more on a thorough dry and dust removal than heavy scrubbing.
How Often Should You Clean an Extractor Fan?
- Kitchen extractor fans and filters: every one to two months, more often if you fry food frequently
- Bathroom extractor fans: every three to six months
- Weekly: a quick wipe of the visible exterior helps prevent heavier build-up between deep cleans
Using your fan every time you cook or shower, rather than skipping it, also helps reduce grease and moisture build-up in the first place.
Related Guides
Frequently Asked Questions
How often should you clean a kitchen extractor fan compared to a bathroom one?
Kitchen extractor fans need cleaning every one to two months due to grease build-up, while bathroom extractor fans, dealing mainly with dust and moisture, typically only need cleaning every three to six months.
Can extractor fan filters go in the dishwasher?
Metal grease filters usually can, though it’s worth checking your specific user guide first. Charcoal or paper filters should never go in a dishwasher, since they aren’t designed to be washed and need replacing instead.
Why does my extractor fan sound louder after cleaning?
This usually points to improper reassembly, such as fan blades refitted the wrong way round or a cover not clipped in fully. Double-check everything is seated correctly and securely.
Can I clean an extractor fan without removing it?
Yes, many parts including the exterior, filter, and blades can be cleaned in place. A full deep clean of the interior housing, however, usually needs the cover or grille removed first.
Final Thoughts
A clean extractor fan works quietly and effectively, while a neglected one struggles to shift steam, smoke, or moisture and can even become a fire risk in a kitchen setting. A regular filter clean, paired with an occasional deeper clean of the blades and housing, keeps the fan running properly and your kitchen or bathroom air genuinely fresher.