Get the Smell Out. For Good.
Smoke, pets, mildew, spilled milk — odor doesn't live in the air. It lives in the seat foam, the carpet backing, the headliner and the ventilation ducts. We remove the source, then destroy what's left with chlorine dioxide.
Most vehicles — includes the full interior deep clean.
Why the smell keeps coming back
Air fresheners and fogger sprays sit on top of the problem. The odor compounds are already absorbed into porous materials, and they keep releasing back into the cabin every time the car warms up in the sun. Until those materials are dealt with, the smell returns within days.
Seat foam
Fabric is only the surface. Liquids and smoke pass straight through it into the cushion foam underneath, which acts like a sponge and holds the odor for years.
Carpet backing & underlay
Below the carpet fibres sit a jute or foam backing and, under that, sound-deadening padding. A surface shampoo never reaches either one.
The headliner
Smoke rises. The headliner holds more nicotine tar than any other surface in the car — and it's the one panel most shops refuse to touch.
HVAC ducts & evaporator
Every time the fan runs, odor is pulled into the ventilation system and settles on the damp evaporator core, deep behind the dash where no towel can reach.
Why chlorine dioxide
ClO₂ is the same class of treatment used professionally after fire and flood damage. It's the core of every odor job we do — but it only works because of everything that happens before it.
It penetrates
A true gas at room temperature with a small molecule, so it reaches into seat foam, carpet padding and fabric instead of sitting on the surface.
It destroys, not masks
It oxidizes the odor compounds themselves. Nothing is perfumed, coated or covered up.
It reaches the ductwork
Drawn through the ventilation on recirculate, it treats the ducts and the evaporator core — the surface no towel will ever touch.
It's interior-safe
At treatment concentrations it is safe on upholstery, trim and electronics, and leaves no chemical smell once the vehicle is aired out.
No gas treatment is a substitute for cleaning. Any shop that skips straight to the gas is selling you a few weeks of relief, not a fix.
Our three-stage process
The order matters. Each stage only works because the one before it was done properly.
- 01
Full interior deep clean & extraction
Most of the smell is physical residue — nicotine tar, spilled liquid, pet dander, food. A gas treatment oxidizes what's left after the residue is gone; it does not remove the residue itself. So we start where the odor actually is.
- Complete vacuum — under seats, along rails, trunk and spare-tire well
- Hot-water extraction of carpets, mats and upholstery
- Leather cleaned and conditioned
- Door cards, console, vents and every crevice
- Cabin air filter replaced — it absorbs odor like a sponge
- 02
Steam cleaning — including the headliner
Steam leaves the tip at roughly 150 °C and goes where a brush can't: vent louvers, seat rails, stitching, seatbelt webbing, the gap under the console. It sanitizes on contact and needs almost no moisture to do it. Then comes the headliner — the step most shops skip.
- Vents, louvers and duct mouths
- Seat rails, seams and stitching
- Seatbelts and webbing
- Trunk lining and spare-tire well
- Headliner, pillars and sun visors — low-moisture method
- 03
Chlorine dioxide (ClO₂) treatment
With the source removed and the interior fully dry, the cabin becomes a sealed treatment chamber. ClO₂ is generated inside the vehicle and the ventilation is set to recirculate on low, pulling the gas through the ducts and across the evaporator core — the one surface you can never physically reach. The car dwells, then gets a full air-out before it comes back to you.
- Whole-cabin gas treatment, not a spray or a fogger
- HVAC ducts and evaporator treated on recirculate
- Trunk and spare-tire well included
- Complete air-out — no residual chemical smell
About the headliner
A headliner is fabric bonded to a foam backing, glued to a moulded shell. Soak it and the adhesive lets go — the whole panel sags and has to be replaced. That's why most shops wipe it and move on, leaving the single most smoke-saturated surface in the car untreated. Our headliner pass works section by section: low-moisture steam in short passes, light agitation with a soft brush, and immediate towel extraction so the foam never saturates. It takes longer. It's also the difference between a car that smells clean and a car that smells clean until the sun hits it.
What it costs
Most vehicles — includes the full interior deep clean.
What's included
- Complete interior deep clean and hot-water extraction
- Steam cleaning of all interior surfaces
- Deep headliner treatment
- Cabin air filter replacement
- Full chlorine dioxide (ClO₂) cabin and HVAC treatment
- Follow-up treatments if the odor returns
What can change the price
- Severity and how long the vehicle was exposed
- Vehicle size — three-row SUVs, vans and cargo areas
What we can promise — and what we can't
Smoke odor penetrates deep into upholstery, carpet, headliner, foam and ventilation systems. For that reason we can't guarantee 100% removal of smoke odor. Results vary with the severity and duration of the exposure and with the materials in the vehicle. Anyone who promises you certainty here isn't being straight with you.
What we do guarantee is our commitment to the outcome. If additional smoke-odor treatment is needed after your service, JR Auto Spa will perform it at no additional charge, within reason — including:
- Additional chlorine dioxide (ClO₂) treatments
- Additional interior shampoo and extraction as needed
Follow-up treatments cover only the smoke odor addressed by the original service. They don't cover new odors, continued smoking or new exposure in the vehicle after the service date, or spills and damage occurring after that date.
Odor elimination FAQ
What kind of odor treatment do you use?
Chlorine dioxide (ClO₂). It penetrates porous materials like seat foam and carpet padding, destroys the odor compounds rather than masking them, and leaves no chemical smell behind. Every odor job we do uses ClO₂ — applied only after the interior has been fully cleaned, steamed and dried.
How long does the service take?
Plan on leaving the vehicle with us for about 24 hours at most. That covers the full process from drop-off to pick-up.
Can you completely remove cigarette smoke smell?
In most vehicles, yes — the car comes back neutral. In heavy long-term cases (years of daily smoking) we can dramatically reduce it but we won't promise 100%, because the odor is absorbed into foam and materials we can't replace. If it comes back, we treat it again at no charge.
Is chlorine dioxide safe for my interior and my family?
Yes, at the concentrations used for vehicle treatment. It's the same class of treatment used professionally after fire and flood damage. The vehicle is fully aired out before it's returned to you, and there's no residual chemical smell or film left on surfaces.
Does it work on pet urine?
The ClO₂ handles the airborne and absorbed odor, but urine that has soaked through into the seat foam or carpet padding has to be extracted and enzyme-treated first — that's stage one. In severe cases the padding underneath the carpet may need to be replaced, and we'll tell you honestly if that's what we're looking at.
Do I need to empty my vehicle first?
Yes — please remove all personal belongings, child seats and anything in the trunk. Fabric items left in the car absorb odor themselves and will re-contaminate a treated interior. Child seats in particular should be cleaned separately following the manufacturer's instructions.
How much does odor elimination cost?
It starts at $424.99+tx for most vehicles, and that includes the complete interior deep clean, the steam and headliner work, the cabin filter, and the full ClO₂ treatment. Larger vehicles and extreme cases — fire, mold, biological contamination — are quoted after we see the vehicle.
Which areas do you serve?
We're based in Pointe-aux-Trembles and serve Montreal and the surrounding area, including Rivière-des-Prairies, Anjou, Montréal-Est, Saint-Léonard, Mercier–Hochelaga-Maisonneuve, Rosemont, Laval, Repentigny, Terrebonne, Mascouche and L'Assomption.
Ready to hand it off?
Bring us the car that everyone comments on. We'll tell you honestly what we can do with it before you commit to anything.
JR Auto Spa · Pointe-aux-Trembles, Montreal · (514) 886-7508