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Why do extractor fan filters need cleaning, and how to clean them
Extractor fan filters get grimy fast. If you don’t clean them, they stop doing their job and that means smells, grease, and even fire risks. Here’s why it matters, and how to sort it.
AO's built-in cooking expert, Amanda Lorenzini, explains why giving your extractor fan a spruce is so important, as well as her top tips for the best results.
Your cooker hood works hard behind the scenes clearing away steam and grease. But over time, that grease can build up in the filters, making it harder for air to flow properly and impacting performance.
To keep everything running smoothly, it's a good idea to clean your extractor fan filters every 2-3 months. But if you love a Sunday fry-up, you might need to do it more.
Keeping your extractor fan filters clean is simpler than you might think. Just pop them out and place them in the dishwasher on a hot cycle. It's an easy way to cut through stubborn grease without any hassle.
You can also wipe down the surrounding area in the meantime with a microfibre cloth. That’ll help keep your cooker hood looking its best.
If you prefer to wash them by hand, soak them in hot, soapy water for at least 10 minutes, then give them a good scrub to lift away any leftover build-up.
Next, use a soft brush or non-scratch sponge to gently clean the filter surface, paying extra attention to the mesh. Steer clear of abrasive scourers, since they can damage the finish. Once you're done, rinse the filters thoroughly and leave them to dry completely before popping them back into place.
How to remove grease filters
Before you get started, switch off your cooker hood and let it cool down fully. Most metal grease filters are easy to remove, usually with a clip, catch or handle. Gently release them and slide them out. Don't force them if they don't come away easily, as the mechanisms can vary between models.
Once the filters are out, check for any heavy grease build-up and rinse away loose residue with warm water. This’ll make cleaning much quicker and easier, helping keep the mess to a minimum.
Not sure how your filters come out? Have a look at the manufacturer's instructions or check the filter frame for guidance. Removing them correctly will avoid damage so you can put them back together properly once they're clean.
Top tip: Pop a towel or tray underneath the cooker hood before you start to catch any drips. If the filters are particularly greasy, grab a pair of cleaning gloves.
The finishing touches
Now leave them to dry completely before popping them back into your cooker hood. Doing it while they're still damp can lead to moisture build-up and make it easier for grease to stick around.
When they're fully dry, make sure they're fitted securely so your extractor fan can do its job properly.
Can charcoal filters be cleaned?
Charcoal filters work a little differently to metal grease filters. They use activated carbon to absorb cooking odours and keep your kitchen smelling fresh.
Over time, that carbon becomes less effective, which means the filter can't trap smells as well as it once did. Unlike grease filters, most charcoal models can't be cleaned with water or detergent, since this can cause damage.
Instead, they'll need replacing from time to time. The best way to know when is to check your cooker hood's user manual, which should tell you how often to swap them out and which type you need.
Top tip: If cooking smells are hanging around long after dinner's done, even with clean grease filters, it could be a sign that your charcoal filter is ready for a replacement.
