How do I eliminate the smoke smell from the house?

Don't worry. Although the smell of smoke is persistent, it can be effectively dealt with through a systematic "three-step" strategy.
I will start with the most basic physical methods and gradually move on to more thorough deep cleaning. I hope this will help you effectively eliminate the smoke smell.
?? Step 1: Allow air to circulate (physical removal)
This is the most fundamental and straightforward step, and its main purpose is to rapidly reduce the suspended smoke particles in the air.
Strong ventilation: Open the opposite windows simultaneously to create air circulation. To speed up the process, you can place a fan near the window and blow it towards the outside. If it's raining or the air quality is poor, you can use the "ventilation" mode of the air conditioner or the exhaust fan to assist.
Air Purifier: Investing in an efficient air purifier is a long-term solution. When making a choice, you can pay attention to the following two key indicators:
High CADR value (Clean Air Output Ratio): Especially for the CADR value for particulate matter, the higher the value, the faster the purification speed. Roughly estimated, the applicable area ≈ CADR value for particulate matter × 0.07 to 0.12.
Composite filter: An efficient composite filter should incorporate a HEPA filter of H13 grade (for filtering out tiny particles such as tar) and a high iodine value activated carbon layer (for adsorbing gaseous pollutants such as nicotine).
Approximate price reference: For effective second-hand smoke air purifiers available on the market, the prices usually range from 1,500 yuan to 6,000 yuan.
✨ Step 2: Skillfully utilize natural adsorbents (chemical neutralization)
After ventilation, you can use some common household items to further neutralize or adsorb odors.
White vinegar: The smell of smoke is slightly alkaline. The acidity of white vinegar can neutralize it. You can add water and white vinegar (in a ratio of about 5:1) to a pot, close the doors and windows, and steam for about 20 minutes. Or mix white vinegar with water in a 1:1 ratio and spray it on the air or furniture surfaces. Placing a bowl of pure white vinegar in a corner of the room and leaving it for one night is also very helpful.
Baking Soda: It is a mild alkaline substance that can neutralize and absorb odors. The most common method is to sprinkle it on sofas, carpets, and mattresses, and leave it for at least 8 hours (or the entire night).
Activated Carbon: A powerful physical adsorbent, highly effective in removing odors from the air and corners. A reference dosage is approximately 200 grams of activated carbon packs for every 10 square meters of space. To maintain the effect, it is recommended to expose the carbon packs to sunlight for 4-5 hours every 1-2 weeks to restore their adsorption capacity. They can be reused.
Tea/coffee grounds: Dry tea and coffee grounds also have the ability to absorb odors. You can put them in breathable cloth bags and place them in small spaces such as wardrobes and drawers.
Candle: Light a scented-free or purifying candle (place it in a safe location). The soot produced by the burning of the candle can absorb the smoke particles in the air.
Lemon: The refreshing scent of lemon can purify the air. Both slicing it and leaving it to stand after boiling are effective methods.
Green plants: Placing plants such as philodendron, spider plant, and ivy at home can assist in purifying the air and absorbing harmful gases.
?? Step 3: Conduct a thorough "deep cleaning" of the entire room
This is the most crucial and thorough step. Because the smell of smoke can seep into every corner of the walls, furniture, and fabrics.
Walls and ceilings
Latex paint wall surface: Mix white vinegar and warm water in a ratio of 1:5. Soak a soft cloth in the mixture and wring it out. Gently wipe the wall surface. For stubborn stains, add a little baking soda to enhance the cleaning power.
Wallpaper surface: Wallpaper is quite delicate and should not be wiped with a damp cloth. It is recommended to use a steam cleaning machine. Spray steam onto the wall surface, soften and dissolve the stains, then use a dry cloth to gently absorb the moisture. If the wallpaper has become severely yellowed and deformed, it may need to be replaced.
The surface of the furniture
Wooden furniture: Wipe with a soft cloth moistened with lemon water or a dedicated wooden cleaner solution. Then dry it promptly and apply a layer of care oil.
Leather sofa: Use a special leather cleaner to wipe it. This can not only remove odors but also maintain the leather quality. Afterwards, it is best to apply a layer of leather conditioner.
Metal/glass furniture: After wiping with a damp cloth, dry it with a dry cloth to prevent water stains.
Hidden crevices: Don't forget to use a vacuum cleaner with a small nozzle to carefully clean every corner inside drawers and cabinets. The dust you remove often contains a smell of smoke. After cleaning, you can place activated carbon packs or tea bags inside.
Fabrics and floors
Curtains, sofa covers, bedding: Remove all removable items, thoroughly clean them with hot water (depending on the fabric) mixed with white vinegar or baking soda, and then expose them to direct sunlight for drying. This is the most effective method to remove the odors deep within the fibers.
Carpets: First, use a vacuum cleaner to thoroughly clean the carpet. Then, sprinkle a large amount of baking soda and let it stand for at least 8 hours. After that, remove the baking soda. If the smell persists, you can consider using a steam cleaner for a deep cleaning.
Floor: Depending on the material, use diluted neutral cleaner or a dedicated cleaner for scrubbing.
⚡ Special Weapon: Ozone Generator (Use with Caution)
Ozone (O₃) is a powerful oxidizer that can efficiently break down odor molecules. It is commonly used by hotels and used car dealerships for deep odor removal. However, due to the harmful effects of high concentrations of ozone on the human body, no people or pets should be present in the room when using it.
When using it, make sure to close the doors and windows and follow the instructions for 30 to 60 minutes. After the usage, you should open the windows for ventilation for at least 30 minutes or more. Wait until the ozone completely reverts to oxygen before entering.
?? Summary: A Quick Action Guide
You can refer to the following table and choose the appropriate plan according to your own situation:
Smoke odor intensity Action plan
Mild / Short-term 1. Powerful ventilation
2. Place white vinegar/activated carbon
3. Turn on the air purifier
Moderate / Smoke odor present in the room frequently 1. All the above steps
2. Comprehensive cleaning of walls, furniture, and floors
3. Thorough cleaning of all washable fabric items
Severe / Old smoke odor 1. All the above steps
2. Clean or replace wallpaper/地毯
3. Consider using an ozone generator (be cautious of safety)
4. Seek help from a professional odor removal company
If all the above methods have been tried and the smoke odor is still stubborn, you can consider contacting a professional indoor environmental remediation company. They will use biological enzymes, photocatalysts, etc. to decompose pollutants at the root cause and solve the problem once and for all, but the cost will also be relatively higher.
Please do remember: The most fundamental way to eliminate the smell of smoke is to completely ban smoking indoors. Otherwise, no matter how thorough the cleaning is, it cannot provide a permanent solution.