First few minutes
Just happened? Do this first
- Ventilate the room, wear gloves and an N95 dust mask, and wash any ash off your skin promptly.
- Lift loose soot dry first, with a vacuum or by shaking off washable items.
- On flat paint, wallboard, wallpaper or bare wood, reach for a dry chemical sponge before any liquid.
- Handle the soot as little as possible, since moving it from item to item spreads it.
Smoke soot on a painted wall is a dusty, oily film, and wetting or rubbing it first can push it into the paint. Lift it dry, then clean lightly. A fresh mark often comes off with a gentle wash, but an older one can leave a shadow, and matte paint can't take much water or pressure.
Soot on walls you plan to paint has to be fully clean and dry first, or it bleeds through the new coat. You can often clean smoke off walls without removing paint if you keep the cloth nearly dry. Stop if the paint starts to lift or go patchy, and let a pro take a look.
Before you start
What walls can take
Use with care4
- Water
- Chlorine bleach
- Solvents (alcohol, spot removers)
- Scrubbing and abrasives
Avoid1
- Soaking
7 items
What you'll need
Tap an item to get it on Amazon, or tick what you already have.
- Disposable glovesKeeps soot and ash off your skin and out of your lungs while you work. (opens Amazon)
- An N95 dust mask (opens Amazon)
- Dry chemical spongeLifts loose soot from porous surfaces before any liquid touches it. (opens Amazon)
- Vacuum with a soft nozzlePicks up loose soot without spreading it.
- Washing (sal) Soda, TSP, or ammoniaThe one cleaner the wall needs, mixed on its own. (opens Amazon)
- Non-abrasive sponges or clothsCleans and rinses without scratching the paint. (opens Amazon)
- Two bucketsOne for the cleaning solution and one for clear rinse water, so you can change them often. (opens Amazon)
As an Amazon Associate we earn from qualifying purchases.
5 steps
Step by step
Step 1 of 5
Mix one measured cleaner
Once the loose soot is lifted dry, dissolve 1 tablespoon of Washing (sal) Soda, TSP, or ammonia in 1 gallon of warm water. Choose one of the three for the whole wall and don't mix it with anything else. Make only as much as you'll use before it needs changing.
Careful. Never mix chlorine bleach with ammonia or other cleaners.
Step 2 of 5
Sponge the solution onto the paint
Dip a non-abrasive sponge in the solution and wring it until it's damp rather than dripping. Work it over one section at a time, going light so the paint isn't scrubbed.
Tip. Wipe in short, overlapping strokes so no lines dry on the surface.
Step 3 of 5
Rinse the section with clear water
Dip a clean sponge in clear water and wipe over the section you just cleaned. Keep rinsing until no cleaner or soot film is left on the paint.
Step 4 of 5
Keep any TSP mix at the limit
If you use TSP, measure it so the mix stays at 2 tablespoons per gallon of water or less, and use the same measure for every section. A measuring spoon keeps the mix from drifting stronger on the stubborn spots.
Careful. Too much TSP can dull the surface of paint, or remove the paint.
Step 5 of 5
Clean the wall from the bottom up
On a whole wall, start low and work up, so runoff never lands on paint you've already cleaned. Change the washing and rinse water often, since dirty water spreads soot back across the paint.
If you'd rather buy than mix
Best products for smoke on walls
Choose an unscented product, since fragranced cleaners only mask the odor. For this job, plain washing soda or TSP used on its own is the product type to look for.
OdoBan Odor Eliminator & Disinfectant Concentrate
How we picked these: each product is made for this type of stain, its maker doesn't warn against using it on walls, and its directions fit the steps above.
Finished the steps? How does it look?
Nice work. Let it dry completely and check it again in good light. Here is what done looks like:
How to tell it's really gone →A faint mark usually needs one more round, not a stronger product.
If the stain was already dried or set, the method changes.
Old, dried or set-in stains →When to call a professional →How to tell it's working
Dark soot should lift onto your sponge as you go, leaving the patch lighter. Wet paint reads darker than dry paint, so judge the wall once it's dry. Back off if the finish turns flat or worn in one spot.
What changes for yours
Adjust for your walls
Walls before painting
If you're cleaning ahead of a repaint, the order matters more than the cleaner. Lift the loose soot dry, clean and rinse the section, and let the wall dry all the way through before anything else touches it.
Don't paint over residue you can still wipe off, since soot left in the surface can show through the new coat. Once the wall is dry, seal the spot with a stain-blocking primer before the topcoat.
Candle and fireplace soot
Soot from candles and fireplaces follows the same rule as any smoke residue, so lift it dry before any liquid. Use the vacuum with a soft nozzle, and keep the dry sponge handy for the sooty area around the fireplace opening.
Then move to the washing soda, TSP, or ammonia solution and clean in small sections. Repeat the sponge and rinse on the darkest spot rather than jumping straight to the stronger mix.
Ash
Ash is dry and gritty, so lift it before anything else. Sweeping or wiping pushes it into the paint and across the room, so use the vacuum with a soft nozzle or a dry sponge instead.
If a film remains after the cleaning passes, treat it as the set-in case: let the wall dry fully and go to the set-in section before trying anything stronger.
Drywall, flat paint and enamel
Drywall, sheetrock, wallboard and flat paint are porous, so they need the dry-first rule most strictly. Lift the soot with a dry chemical sponge, then move to the sponge and solution with very little water on it.
The porous list does not name enamel, so test a small spot before cleaning the whole wall. Keep the water light on any of these finishes.
Black and yellow smoke stains
The black part is soot, so the dry lift and cleaning passes handle it. Work through the dry lift first, so you can see what's left before deciding on anything stronger.
A yellowish tinge left after cleaning is the set-in case, so let the wall dry fully and go to the set-in section before trying anything more aggressive.
Old, dried or set-in stains
Old soot has had time to settle into the paint, so the first passes may only lighten it. If the soot still shows after rinsing, mix 2 tablespoons of Washing (sal) Soda, TSP, or ammonia per gallon of water and repeat the sponge and rinse on those spots only.
Give the wall a full dry before you judge a spot, since a damp patch looks darker than it is. For a penetrating interior stain, test a mild detergent and then a gentle abrasive cleaner with water on a small area first.
If the staining still shows after cleaning, seal the spot with a stain-blocking primer before you repaint. Where it still bleeds through, a stain-blocking paint made from lacquer or oil is typically the next step, and very old penetrating stains may never fully disappear.
Vinegar, baking soda, peroxide and more
Do home remedies work on smoke on walls?
Most household remedies you'll see online don't belong on a painted wall. The washing soda, TSP, or ammonia solution is the one to use, and the rows below explain why each other option stays off the wall.
Skip4Avoid2
What makes it worse
Mistakes to avoid
Don't start with water on sooty walls
On flat paint, wallboard and wallpaper, a wet first pass can drive soot in and leave a permanent stain. Lift the loose soot dry first, then move to the solution.
Don't vacuum soot with an upright
Upright vacuums and brush or beater-bar attachments force soot into other things in the room. Use a vacuum with a soft nozzle held just above the surface instead.
Don't clean from the top down
Working downward lets dirty drips run over the section you've just cleaned. Start at the bottom and work up, rinsing as you go.
Don't reuse dirty water
The wash water picks up soot fast, and dipping the sponge back in puts it right onto the wall. Change the wash and rinse water often.
Don't jump straight to a strong mix
Start with the weakest mix in the steps and only step up if it doesn't work. Going straight to a strong solution can dull the paint or lift it off.
When to call a professional
When the mark survives the cleaning steps, a paint store can help with a touch-up for that section. If the wall is grasscloth wallpaper, professional cleaning may be necessary, so ask before you wet it.
Questions
Does weed, dab, or incense smoke stain walls?
Yes, smoke from any of these can leave the same dry or oily residue as other smoke. Treat it like soot: lift it dry first, then clean with the solution described above.
How can I prevent smoke stains on walls?
The most useful habit is lifting fresh residue right away, while it is still dry and loose. Soot that has been rubbed or wetted sets deeper, so a quick dry lift with a vacuum or sponge beats waiting.
What should I do about carbon monoxide stains on walls?
A dark mark near a fireplace or heater is most likely soot, so the steps above apply. Carbon monoxide is a safety concern rather than a cleaning one, so if you're worried about it, ventilate the room and have the source checked.
Can I use bleach on a smoke-stained painted wall?
Not as a first step. Chlorine bleach is listed only for mildew on painted walls, so keep it out of the cleaning for smoke.
Will the stain come back after I paint?
It can if soot is still in the surface, so make sure the wall is clean and dry before you paint. Seal the stain with a stain-blocking primer first, as the set-in section explains.
Can I wash a wall I just painted?
Wait about two weeks, since washing fresh paint sooner can alter the finish. Until then, use only a dry cloth on the soot, and keep water away from it.
Will cleaning dull flat or matte paint?
It can if you press hard or use too much water, so keep the cloth wrung out and the strokes light. Test the mix on a hidden spot first. If the paint looks even and shows no water marks once dry, you're in good shape.
Can I clean smoke off wallpaper?
Only if it's washable, and even then use a lightly damp sponge with no abrasives. Dry the paper right away, because too much moisture can damage it. Textured varieties may refuse water entirely, and grasscloth is better left to a professional cleaner.
Smoke on other materials
Other stains on walls
Start from the bigger picture
How we know this
Every method, amount and warning here comes from university extension services, industry bodies and product makers. We read them, check every step for unsafe combinations and changed amounts, and write it up so you can follow it.