How often should you clean a range hood filter? Grease filters, charcoal filters and the dishwasher

Monthly is a good default for grease filters

If you cook most days, wash the metal grease filter about once a month — more often if you fry or stir-fry a lot. Broan says its aluminum mesh filters should be washed approximately every month depending on use, and more often for cooking that throws off a lot of grease, like frying or wok cooking. CHOICE, the Australian consumer group, puts it at every 1–2 months depending on how often you cook greasy or fatty food. In the UK the same part is usually called a cooker hood filter, and the advice is the same.

Manuals don’t all agree, which is why yours matters. GE’s owner’s manual for its JVX3240 and JVX3300 hoods says the grease filter should be cleaned every 6 months, or as needed. For a home that cooks lightly that may be fine; for daily frying, “as needed” will come around much sooner.

Filter	How often	How
Metal grease filter (mesh or baffle)	About monthly (Broan); every 1–2 months (CHOICE)	Wash by hand with mild detergent, or in the dishwasher if the manual allows
Charcoal filter (ductless hoods)	Replace: every 6–12 months (GE); often 3–4 months (CHOICE)	Can’t be washed — replace it
Hood surfaces	Frequently, when greasy (GE)	Hot, damp cloth with mild detergent; no steel wool or abrasive cleaners

Why it matters: suction and grease fires

A clogged filter makes the hood work harder, and the grease it holds can burn. CHOICE says a clean filter means the hood doesn’t need to work as hard, with lower running costs and less noise — and that grease and oil build-up on the filter is a fire hazard. London Fire Brigade’s cooking safety advice is to regularly clean the oven, hob, cooker hood and extractor fan, because accumulated fat and grease can ignite. GE’s manual puts it simply: grease should not be allowed to accumulate on the fan or filter.

That isn’t a reason to worry, just a reason to keep the filter on a schedule. If grease has built up inside the fan housing or ductwork, that deeper job is one for the manufacturer’s service or a professional cleaner.

How to wash a metal grease filter

Warm water, a mild detergent and something soft will remove most of it.

1. Switch off first: Bosch says to make sure the hood is switched off and unplugged before you start.
2. Remove the filter the way your manual shows — usually a latch or handle.
3. Wash it: Bosch UK suggests soaking in warm water with a mild detergent for about 10–15 minutes to loosen the grease, then scrubbing with a soft brush or sponge. CHOICE suggests about 10 minutes in hot soapy water. GE says to swish the filter in hot soapy water and rinse.
4. Skip the scouring pad: GE says not to use abrasive cleansers.
5. Dry it completely: Bosch says to let the filter air dry fully, and not to use a hairdryer or other heat source, which could damage it.

One exception: Bosch’s US support page says to wash its filters with mild, soapy water and a soft cloth and not to soak them. If your manual says no soaking, don’t.

The dishwasher question

Metal grease filters often can go in the dishwasher, but only if your manual says so.

• Broan: all-metal filters can be washed in the dishwasher with a non-phosphate detergent. Phosphate detergents or local water can discolor the filter without affecting performance; wash it by hand with mild detergent if you want to avoid that.
• GE (JVX3240/JVX3300): the grease filter is dishwasher-safe, though some discoloration may occur.
• Bosch: some grease filters are dishwasher safe; check the manual, then put the filter in the bottom of the dishwasher.
• Charcoal filters: never. GE says not to rinse them or put them in a dishwasher.

Common mistakes

• Washing a charcoal filter: it can’t be cleaned; it has to be replaced.
• Scrubbing with steel wool or abrasive cleaners: GE says not to use abrasive cleansers on the filter, and that steel wool scratches the hood’s surfaces.
• Putting it back wet: let it dry completely first.
• Cleaning only the outside of the hood: a shiny hood can still have a filter full of grease.
• Ignoring how you cook: frying and stir-frying load the filter faster, which is why Broan says to wash it more often if you cook that way.

How to remember

A monthly job is easy to lose track of: too far apart to keep in your head, but frequent enough that adding each one to a calendar by hand is a chore. And how fast the filter fills depends on how much you cooked that month. When several people share the cooking, everyone tends to think someone else washed it.

Track “wash range hood filter” as a monthly item in a shared list, so whoever does it marks it done. The kitchen has a few other jobs with a similar rhythm, like cleaning the fridge and descaling the kettle. Around the rest of the house, the robot vacuum’s filter and brush and the air conditioner filter are worth tracking the same way.