Remove Soot and Smoke Film: Step-by-Step Cleaning Guide • Everyday Cheapskate

If you’ve ever lit a cozy fire, burned a few scented candles, or cooked up a storm in the kitchen, chances are you’ve noticed a mysterious haze creeping onto your walls or ceilings. At first, it’s subtle—maybe just a bit of discoloration. But give it time, and suddenly everything looks dingy, dull, and just… off. That, my friend, is smoke film and soot buildup—and once it’s there, it doesn’t like to leave without a fight. If you’re wondering how to remove soot and smoke film, you’re in the right place!

Smoke film and soot have a sneaky way of settling into every nook and cranny—walls, ceilings, light fixtures, you name it. These fine, oily particles can come from a variety of sources: fireplaces, candles, wood stoves, cooking, and even smoking indoors. Over time, they cling to surfaces and create a dull, dirty film that seems almost impossible to get rid of.

For years, I didn’t have a great solution to offer when readers asked how to tackle this grime. That all changed when I met Lestoil. This powerful multipurpose cleaner cuts through greasy soot like butter—but only if you know how to use it safely and effectively. So if you’ve been scrubbing your arms off with little to show for it, don’t worry. I’ve got the method (and cleaner) that actually works—without damaging your walls or your sanity.

Why Lestoil Is a Powerful Solution for Soot and Smoke

Lestoil Heavy Duty Multi-Purpose Cleaner, Amber, 48 Fl Oz, Pack of 1

When it comes to cutting through tough, greasy grime—like the kind left behind by smoke film and soot—Lestoil really shines. This heavy-duty cleaner is designed to break down oil-based messes, which makes it especially effective on the stubborn, sticky residue left by fireplaces, candles, and indoor smoke. You can find Lestoil at most home improvement stores or online, and just a little goes a long way.

That said, it’s not a one-size-fits-all miracle. Lestoil is a strong solvent, so it’s not ideal for every surface. Be cautious when using it on painted wood, hardwood floors, unsealed grout, or delicate furniture finishes. Always test in a small, hidden spot first to make sure it won’t cause damage or discoloration. Better safe than sorry—especially when you’re working on surfaces that can’t be easily replaced.

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Lestoil Heavy Duty Multi-Purpose Cleaner, Amber, 48 Fl Oz, Pack of 1

MORE: How to Get Grease Stains Out of Clothes: The Ultimate Guide with Lestoil

What You’ll Need to Clean Smoke Film Without Damaging Surfaces

Before we dive into the step-by-step, let’s make sure you’ve got the right tools on hand. Cleaning with Lestoil isn’t complicated, but using the proper materials can make the job safer, more effective, and a whole lot less messy.

Materials You’ll Need

Lestoil Cleaner: Lestoil is designed to break down grease and grime, making it ideal for smoke film and soot.
Warm Water: Helps dilute the Lestoil and improve its effectiveness. Warm (not hot) water works best.
A Bucket: You’ll need this to mix your cleaning solution. Go for one with a sturdy handle so you can move it around easily.
Clean, Soft Cloths or Sponges: Avoid anything abrasive that could scratch delicate surfaces. Microfiber cloths work especially well.
Rubber Gloves: Lestoil can be harsh on skin, so gloves are a must to keep your hands protected.
Protective Eyewear (Optional): If you’re cleaning overhead or working in tight spots, safety glasses can help keep splashes out of your eyes.

Step-by-Step: Cleaning Walls, Ceilings, and Surfaces

Step 1: Air it out

Before you dive in, open windows, doors, and maybe even pop on a fan. Good airflow helps clear out that smoky smell and cuts down on the strong scent of Lestoil while you clean.

Step 2: Suit up

Slip on a pair of rubber gloves to protect your hands. If you’re working overhead or near your face, safety goggles aren’t a bad idea either—because no one wants a splash of cleaner in the eye.

Step 3: Mix your magic solution

In a bucket, combine 1 part Lestoil to 4 parts warm water. That’s a good starting ratio for most jobs, but if you’re dealing with extra-heavy soot, you can bump it up a notch. Don’t go full strength unless absolutely necessary—Lestoil is strong stuff.

Step 4: Test first (always!)

Pick a small, hidden area and give your mixture a test run. Some painted or porous surfaces don’t play well with Lestoil, and a quick test can save you from a bigger mess.

Step 5: Wipe gently from top to bottom

Dip your cloth or sponge in the solution, wring it out well (you want damp, not dripping), and start wiping. Work from the top of the wall down—gravity is your friend here and this helps prevent streaks.

Step 6: Use a little elbow grease—gently

If the soot is stubborn, a bit of light scrubbing may be needed. Just be gentle—scrubbing too hard can take paint off right along with the soot.

Step 7: Rinse and dry

Once the grime is gone, go back over the area with a clean cloth dipped in plain water. This removes any leftover cleaner. Then dry the surface with a soft towel to avoid water marks.

Step 8: Repeat if needed

Sometimes soot is clingy and needs a second (or third) pass. Take your time. Better to go slow and steady than risk damaging your walls with aggressive scrubbing.

Step 9: Don’t forget the neighbors

Soot has a way of drifting. Once you’ve tackled the worst of it, take a look at nearby surfaces—light switches, trim, baseboards—and give them a quick wipe too.

When to Avoid Lestoil (And What to Do Instead)

As much as I love Lestoil for cutting through soot and grime, it’s not the right fit for every job. There are times when you’ll want to steer clear—and I’m here to help you spot those situations before any damage is done.

Painted walls that aren’t washable? Skip it. If your paint finish is flat or matte (not washable or scrubbable), Lestoil can be too harsh and may leave behind streaks or dull spots. Instead, try a gentle solution of warm water with a few drops of mild dish soap and a microfiber cloth. Go slow and blot rather than scrub.
Delicate or porous surfaces like unfinished wood or natural stone? Nope. These surfaces can absorb Lestoil, leaving behind a lingering smell—or worse, a darkened stain. In those cases, less is more. Stick with a gentle cleaner made for wood or stone, or just a soft cloth dampened with plain water.
Vintage finishes or antique furniture? Better safe than sorry. Lestoil can strip finishes and cause discoloration on older pieces. Test very carefully or, when in doubt, opt for a cleaner made specifically for antiques. Or call in a pro for advice—some things are just too special to risk.

Bottom line? Lestoil is a powerhouse, but like all strong cleaners, it needs to be used wisely. When in doubt, test first—or go with something gentler and safer.

Final Touches: Ventilating and Deodorizing Your Space

Once the smoke film and soot are gone, you’re not quite finished—because that smoky smell? It can linger like an uninvited guest who doesn’t take a hint. To wrap things up the right way, keep windows open as long as the weather allows, run a fan to move the air around, or turn on an air purifier if you have one.

And here’s where I reach for my not-so-secret weapon: Nok-Out. I’ve gone on about it before (and for good reason!), but let me just say—this isn’t your average “spray and pray” deodorizer. Nok-Out doesn’t cover up odors with some fake “fresh” scent; it actually eliminates them at the source.

Lightly mist it in the air or apply directly to stubborn-smelling surfaces. It’s non-toxic, safe around kids and pets, and leaves behind that magical scent of… well, nothing. Which, let’s be honest, is exactly what we want.

MORE: 11 Everyday Uses for Nok-Out—the World’s Best Odor Eliminator

Question: What’s the most stubborn mess you’ve ever cleaned up? Smoke, crayon, red wine… or something even worse? Tell me your tale of cleaning woe in the comments below.

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Last update on 2026-07-21 / Affiliate links / Images from Amazon Product Advertising API

Suzanne says:

May 6, 2025 at 10:23 am

I need to clean a room a smoker stayed in. The walls are a mess. They’re drywall, painted long ago, and will need repainting. I’m not concerned with damaging the paint. But I’m wondering if, once cleaned with Lestoil and rinsed, the drywall will be ready for paint. Or will I need to do something else before painting?

Linda Wilson says:

May 1, 2025 at 10:39 am

Re: Lestoil-Years ago my mom dried a silky polyester blouse in the dryer using a dry sheet as softener. The blouse came out covered in greasy looking marks everywhere. Nothing she tried could get them out. She asked a friend who happened to be a chemist what to do. Her answer-Lestoil…and it worked! Blouse saved 🙂

Patti T says:

February 11, 2024 at 5:30 am

Hi Mary, we purchased the WillMaker program you recommended and it is everything you said and more! I am beyond impressed with its ease. Thank you for another great recommendation. I feel much better as to how things should go for our girls when the time comes those tuff decisions will need to be made.

I have purchased several things based on your recommendation and have been extremely happy each time. Towels, sheets, cordless vacuum, hand can opener, leather cleaner and WillMaker. Thank you!!

How to Remove Stubborn Soot and Smoke Film from Household Surfaces

Why Lestoil Is a Powerful Solution for Soot and Smoke

Lestoil Heavy Duty Multi-Purpose Cleaner, Amber, 48 Fl Oz, Pack of 1