How to Clean a Kitchen Chimney at Home: Step-by-Step Guide

A kitchen chimney is one of the hardest-working appliances in an Indian home. Frying, tadka, curry-making, deep frying - day after day it absorbs everything. And each day, grease, smoke residue and carbon deposits build up inside the filter, the duct and on every surface you cannot easily see. The result: reduced suction, unpleasant odours, visible grease dripping onto the stove, and in extreme cases, a fire hazard. Yet chimney cleaning is one of the most neglected household chores in India, mainly because people are not sure how to do it properly or what to use (Similar Article).

This guide covers everything: how often to clean, what to use, a complete step-by-step method, and specific tips for the mesh filter, the baffle filter, and the outer hood.

How Often Should You Clean Your Kitchen Chimney?

• Light cooking household (2 meals a day): Every 2 to 3 months.
• Regular Indian cooking (daily frying, tadka): Every 4 to 6 weeks.
• Heavy cooking (restaurant-style, daily deep frying): Every 2 to 3 weeks.

A quick rule of thumb: If you hold your hand under the chimney while it is running and feel significantly reduced suction compared to when it was new, it is time to clean.

Here's What You Will Need

• Chimney cleaner spray (foaming formula recommended — explained below)
• Warm water and a bucket or basin
• Soft scrubbing brush or old toothbrush
• Microfibre cloth
• Rubber gloves
• Newspaper or cloth to protect the stove below

A foaming chimney cleaner like Koparo’s Magic Foam Cleaner is significantly more effective than a liquid spray for chimney filters. The foam clings to vertical and angled surfaces, penetrates grease over time, and requires less scrubbing effort. India’s 1st foaming formulation.

Understanding Your Chimney Filter Type

1) Mesh / Aluminium Filter

Common in older and mid-range chimneys. Multiple layers of aluminium mesh that trap grease. These can be removed and washed. High grease accumulation — needs regular cleaning.

2) Baffle Filter

Common in premium chimneys. Curved stainless steel panels that redirect airflow, causing grease to drip away. More efficient than mesh. Easier to clean but heavier and bulkier.

3) Charcoal Filter

Used in ductless (filterless) chimneys for odour absorption. These cannot be washed, they need to be replaced every 6 to 8 months.

Step-by-Step: How to Clean Your Kitchen Chimney

Step 1 - Safety First: Switch Off and Cool Down

Switch off the chimney and unplug it from the power supply. Allow it to cool completely if you have been cooking. Never spray liquid cleaner on a hot chimney. Apart from the safety risk, heat causes cleaning agents to evaporate before they can work.

Step 2 - Protect the Area Below

Place a newspaper, old cloth or a silicone mat over the gas stove and countertop beneath the chimney. During cleaning, loose grease and drips will fall.

Step 3 - Remove the Filter

Most chimney filters slide out or release with a simple push-button mechanism. Consult your chimney’s manual if you are unsure. Handle the filter over the protected stove area, it will be Greasy.

Step 4 - Soak the Filter

Place the filter in a large basin or the kitchen sink. Spray or pour hot water over it to loosen surface grease. Then spray your chimney foam cleaner generously on both sides of the filter and leave it to soak for 10 to 15 minutes. The foam will penetrate the mesh layers or baffle channels, breaking down grease from the inside. This is the key advantage of a foaming formula, it does not drain away during the soak time.

Step 5 - Scrub and Rinse

After soaking, use a soft brush to scrub both sides of the filter in gentle, circular motions. Rinse with warm running water. For particularly caked mesh filters, a second round of foam and soak may be needed. Repeat until the water running off the filter is clear rather than brown or yellow.

⚠️ Do not use steel wool or hard abrasive scrubbers on aluminium mesh filters. They will damage the mesh structure.

Step 6 - Clean the Inside of the Hood

While the filter is soaking, spray the interior surfaces of the chimney hood with your foam cleaner. The foam will cling to the vertical and angled surfaces. Leave for 5 minutes, then wipe clean with a microfibre cloth. For carbon deposits along the edges of the duct entrance, a soft toothbrush helps reach into corners.

Step 7 - Clean the Outer Hood

Spray the exterior stainless steel or painted surfaces and wipe with a clean microfibre cloth. For fingerprints and light grease on stainless steel, wipe in the direction of the grain to avoid streaks.

Step 8 - Dry and Reassemble

Allow the filter to air dry fully before replacing it. Reassemble and run the chimney on low for a minute or two to confirm it is working properly. Suction should feel noticeably stronger.

Try Koparo's Magic Foam Cleaner, India’s 1st foaming kitchen degreaser. Plant-based, baking soda-powered. Works on chimneys, ovens, gas stoves and grills. No toxic fumes.

How to Remove Very Heavy Grease Build-Up?

If your chimney has not been cleaned in six months or more, the grease will be thick, sticky and partially carbonised. Standard cleaning may not be enough in one go.

• Soak the filter in a basin of very hot water with a generous amount of foam cleaner or dish soap for 30 minutes.
• Scrub with a firm (but not metal) brush. Rinse.
• Repeat the soak, the second round of penetration is often more effective once the surface layer has been removed.
• For baked-on black carbon deposits around the duct entrance, apply undiluted foam cleaner directly, and leave for 20 minutes, then scrub with a toothbrush.

DIY vs Professional Chimney Cleaning: When to Call a Service

For filters, hood interior and exterior surfaces - clean at home with a good foam degreaser like Koparo’s Magic Foam Cleaner Spray. This handles 90% of what a chimney needs.

Call for a Professional Service When:

• You notice grease dripping from the duct above the hood (indicates internal duct build-up you cannot reach).
• Suction is very poor even after a thorough filter clean (may be a motor or duct blockage).
• You smell burning during chimney operation (internal grease fire risk — stop using and call immediately).

Chimney Maintenance Tips

• Clean your chimney filter on a schedule, not only when it looks dirty. Grease deep in the mesh is invisible until it has already reduced performance.
• After heavy cooking sessions (biryani, frying for a party), run the chimney for an extra five minutes after switching off the gas, this clears residual smoke from the duct.
• Wipe the exterior of the hood weekly with a damp cloth to prevent surface grease from building up and hardening.
• Never close the damper valve (if your model has one) without cleaning. Trapped grease in the closed duct will carbonise.

Koparo’s Magic Foam Cleaner is India’s first foaming kitchen degreaser, made with baking soda and plant-based surfactants. Safe for food preparation areas, effective against the heaviest Indian cooking grease. Find it at koparoclean.com.