How to Clean the Kitchen Cooker Hood Filter

Keeping your kitchen cooker hood working properly often comes down to one quiet but vital part: the air extractor filter. This component traps grease, steam and airborne particles released while you cook. Without regular cleaning, it builds up residue, becomes less effective and can even create safety concerns. That is why washing the metal filter regularly is widely seen as a basic household task.

What is the kitchen cooker hood filter and what does it do?

A kitchen cooker hood filter is designed to capture grease and impurities from the air, helping to stop them spreading around the room. On externally vented (ducted) models, it holds back oily residue before the air is expelled outdoors. On recirculating cooker hoods, it works alongside an activated carbon filter to help cut down on odours.

In most cases, these appliances use two main types of filtering element, each with its own features and care requirements:

• Metal filters: made from aluminium or stainless steel and built from layered meshes; they can be washed and reused.
• Carbon filters: used in ductless (recirculating) cooker hoods; they cannot be washed and must be replaced periodically.

Watch a video on the Patricio Carvalho YouTube channel covering quick tricks for melting heavy grease from utensils and metal racks using fizzy mixtures:

https://www.youtube.com/watch?v=R9_mD-XN9U0

How does removing and carrying out basic maintenance on the cooker hood filter work?

Before cleaning anything, unplug the cooker hood or ensure the unit is completely switched off to avoid accidents. The metal filter is usually released using clips, latches or handles, as described in the manufacturer’s manual-following this step matters to prevent damage.

Over time, grease can form a thick, sticky layer across the metal mesh that won’t shift with ordinary soap and water alone. Besides reducing the hood’s extraction power, a dirty filter may cause unpleasant smells, increase the risk of residue igniting due to the hob’s constant heat, and even allow grease to drip back down onto the cooker.

How to clean a metal cooker hood filter with hot water and simple products

One of the most common approaches for cleaning a metal kitchen cooker hood filter combines very hot water, washing-up liquid and bicarbonate of soda. Together, they help break down built-up grease and lift grime without being harsh on the material. You can use a washing-up bowl, a large roasting tin or the sink itself.

1. Fill the container with hot water, enough to fully cover the filter.
2. Add a few spoonfuls of bicarbonate of soda and a small amount of liquid washing-up detergent.
3. Place the filter into the solution, making sure the entire surface is in contact with the mixture.
4. Leave it to soak for around 15 to 30 minutes, depending on how greasy it is.
5. After soaking, gently scrub using a soft sponge or a brush with soft bristles.

If the grease is heavily baked on, you may need to repeat the process with fresh hot water and a stronger dose of detergent, and it is sensible to wear gloves when using more alkaline solutions. Many modern metal filters are also dishwasher-safe, although pre-treating in hot water by hand helps reduce the amount of grease that ends up in the machine.

What care and cleaning frequency are recommended for the cooker hood filter?

Certain habits can damage the filter or affect how the cooker hood performs, which is why some products and tools are best avoided. Abrasive pads, wire wool, knives and rigid scrapers can tear the metal mesh or warp the frame, making it harder to refit and shortening the accessory’s lifespan.

How often you should clean it depends on how frequently you cook and what you tend to make. Monthly cleaning is common in kitchens with lots of frying, while every two to three months may be enough for lighter use. After washing, rinse thoroughly, let the water drain away, and ensure the filter is completely dry before reinstalling it-this helps reduce the risk of corrosion, lingering odours and performance loss over time.