How to Clean a Rangehood Filter: Grease Filter Maintenance Guide

A clogged rangehood filter is one of the most common and easiest-to-fix appliance maintenance issues. Grease builds up in the filter over time, reducing suction, increasing fire risk and creating unpleasant odours. Here's how to clean it properly.

How Often Should You Clean a Rangehood Filter?

For regular home cooking, clean your rangehood filter every 1–3 months. If you cook frequently with high heat, fry regularly or cook Asian-style stir fries, you may need to clean it monthly. A simple test: hold the filter up to light. If you can't see through it clearly, it needs cleaning.

Types of Rangehood Filters

Aluminium mesh filters: The most common type. These are washable and reusable. They come out easily — usually by pressing a tab or sliding them out. They're dishwasher-safe in most cases but hand washing with hot water and degreaser gives the best results.

Charcoal/carbon filters: Used in recirculating rangehoods (ducted models don't need them). These are not washable — they must be replaced every 3–6 months. Some are labelled for microwave regeneration; check your manual.

Baffle filters: Found on higher-end rangehoods. The slanted baffles catch grease before it reaches the duct. These are dishwasher-safe and very easy to clean.

How to Clean an Aluminium Mesh Filter

Method 1: Boiling water and dish soap

1. Remove the filter from the rangehood (press the clips or tabs)
2. Boil a full kettle and pour it over both sides of the filter in the sink or a large bowl
3. Apply dish soap directly to the filter and scrub with a soft brush
4. Rinse thoroughly with hot water
5. Shake off excess water and leave to dry completely before reinserting

Method 2: Baking soda bath

1. Fill your sink with boiling water
2. Add half a cup of baking soda and stir
3. Submerge the filter and soak for 10–15 minutes
4. Scrub with a brush, rinse well and dry

Method 3: Dishwasher

Many aluminium filters are dishwasher-safe. Run them on the hottest cycle with a full detergent dose. Check the filter doesn't block the spray arms. Some may discolour slightly but will still perform correctly.

Putting It Back

Always ensure the filter is completely dry before reinserting. A wet filter won't increase fire risk directly, but it can drip onto your stovetop or leave moisture in the rangehood housing, potentially affecting the motor over time.

Signs Your Filter Needs Replacing Not Cleaning

• The mesh is bent, torn or has holes
• Grease is dripping from the filter (badly overdue for cleaning)
• Suction doesn't improve after cleaning (motor or duct may be the issue)

Rangehood Upgrade Available

If your rangehood is old and underpowered, upgrading to a correctly sized model makes a significant difference to your kitchen air quality. Oceania Appliances stocks rangehoods at competitive prices with free Sydney delivery and a 3–6 month warranty.