How to Remove Grease From an Extractor Fan

The sticky film on your extractor is not just a cosmetic nuisance. It traps cooking odours, dulls the finish and can reduce how effectively the fan clears steam from your kitchen. To remove grease from an extractor properly, you need to clean more than the visible underside – especially the filters, where most of the build-up collects.

A regular wipe after cooking makes a real difference, but a heavily used extractor needs a more thorough approach from time to time. The right method depends on the type of appliance, the material of the filters and just how long the grease has been sitting there.

Why extractor grease needs attention

Every time you fry, roast or simmer, airborne oil rises with the steam. Your extractor is designed to catch it, but over weeks and months that oil turns into a tacky layer. Dust then sticks to it, creating the yellow-brown residue that seems impossible to shift with a quick spray and cloth.

When filters are clogged, airflow can suffer. That means more lingering smells, more condensation and more grease settling on nearby cupboards and tiles. In kitchens with a range cooker, AGA or frequent family cooking, the build-up can happen faster than expected.

There is also a practical safety reason not to ignore it. Grease is combustible, so filters and surrounding surfaces should be kept clean in line with your extractor manufacturer’s instructions. Cleaning will not fix a faulty fan or damaged electrical component, but it is an essential part of sensible kitchen maintenance.

Before you remove grease from an extractor

Start by switching the extractor off at the mains. Do not rely only on the control button, particularly if you will be removing filters or cleaning close to the fan housing. Let the hob and surrounding surfaces cool completely too.

Put down an old towel or protective sheet over the hob. It catches drips and prevents cleaning residue from drying onto the surface below. Avoid soaking any electrical controls, light fittings, vents or the motor area. Water and degreaser belong on the removable parts and external surfaces, not inside the electrics.

Check your appliance manual if you still have it. It will confirm whether the filters are aluminium, stainless steel or another material, and whether they are suitable for a dishwasher. Some finishes and coatings need gentler treatment than others.

Start with the grease filters

Most domestic extractors have metal mesh filters underneath the canopy. Look for a small catch, handle or release tab, then support the filter with one hand as you unclip it. They can be surprisingly heavy when coated in grease.

Fill a sink, washing-up bowl or large tray with very hot water and add washing-up liquid designed to cut through grease. Leave the filters to soak for 15 to 30 minutes. For ordinary build-up, this softens the residue enough for a non-abrasive brush or soft cloth to lift it away.

If the grease is stubborn, a paste made from bicarbonate of soda and a little water can help. Work it gently over the mesh and leave it for several minutes before brushing and rinsing. Do not use wire wool, scouring pads or harsh caustic products. They can scratch the metal, damage coatings and leave the filter looking worse than when you started.

Some metal filters are dishwasher-safe, but this is not always the best answer. A dishwasher may leave aluminium filters looking dull or discoloured, and it is unlikely to restore filters that are thick with old, baked-on grease. Hand cleaning gives you more control and lets you see whether the mesh is genuinely clear.

Rinse thoroughly, shake away excess water and allow the filters to dry fully before putting them back. Refitting damp filters can encourage odours and is best avoided.

What about charcoal filters?

If your extractor recirculates air rather than venting outside, it may contain charcoal filters behind the metal grease filters. These are not usually washable. They absorb odours and need replacing at intervals set out by the manufacturer, commonly every three to six months depending on use.

Trying to wash a standard charcoal filter will not refresh it. If cooking smells remain after cleaning the grease filters, replacement may be the answer.

Clean the extractor housing without damaging it

With the filters out, use a cloth dampened with warm water and washing-up liquid to wipe the underside, edges and exterior of the hood. Work in small sections. A cleaner applied directly to the cloth is safer than spraying the appliance, where liquid can run into seams, switches or the motor housing.

For heavier residue, use a kitchen degreaser that is suitable for your extractor’s finish. Test it first on an inconspicuous area and follow the label instructions. Stainless steel can show streaks and scratches easily, so wipe with the grain where visible and buff dry with a clean microfibre cloth.

Pay attention to the lip around the filter opening, the control panel and the light surrounds. These are the places grease tends to collect unnoticed. A soft toothbrush can be useful around crevices, but use it gently and keep moisture away from electrical fittings.

Never scrape grease off with a knife, metal scraper or abrasive sponge. It may feel satisfying in the moment, but scratches give future grease somewhere to cling and can permanently spoil the appearance of a premium appliance.

When home cleaning is enough – and when it is not

A home clean is usually enough when the filters are still structurally sound, grease softens during soaking and the extractor clears steam as it should. Keeping on top of the task little and often is far easier than tackling a year of residue in one afternoon.

It is time to consider professional help when grease has hardened into a thick coating, the hood is difficult to access, or the appliance has not been cleaned for a long time. Built-in extractors, decorative chimney hoods and models fitted above range cookers can be awkward to clean safely without the right process. If the fan is noisy, airflow remains poor after the filters are cleaned, or lights and controls are not working, contact a qualified appliance engineer rather than attempting to dismantle the unit yourself.

A specialist clean can be particularly worthwhile before moving home, after renovation work or when restoring a kitchen that has seen years of heavy use. At OvenGleamers, our trained technicians clean extractors as part of a detailed appliance-cleaning service, using a careful strip-down approach where appropriate and fume-free products designed for the home environment.

A realistic cleaning routine

For most households, wipe the outside of the extractor weekly or whenever you clean the hob. Clean metal grease filters every month if you cook most days, or every two to three months in a lighter-use kitchen. Frying, wok cooking and cooking for a large family may call for more frequent attention.

The simplest test is visual. If the mesh looks dark, feels sticky or drips when handled, do not wait for a calendar reminder. Clean it. It is quicker than you think once grease has not had time to harden.

After cleaning, run the extractor for a few minutes while cooking and leave it on briefly afterwards to clear lingering steam. This small habit helps protect cupboards, walls and the extractor itself. A clean filter will not make an underpowered fan stronger, but it gives the appliance the best chance to do the job it was fitted to do.

A well-kept extractor should disappear into the background: quietly clearing the air, not adding another grimy job to the kitchen list. Give it regular attention, and when the grease has got beyond a straightforward clean, choosing specialist care can bring back the fresh, polished finish your kitchen deserves.