A Montreal car interior goes through a specific cycle: slush from boots in January, yellow pollen in late April, beach sand in July, then crushed leaves in October. Each season drops something different into the fabric and onto the plastic, and a portable vacuum only lifts a fraction of it. Interior cleaning at LustrAuto goes deeper: fabric, carpet, vinyl and leather each get their own method.
The service takes three to five hours depending on condition and seat count, inside a closed bay where the heating allows hot-water extraction even in winter. Anything removable without tools gets removed: mats come out, headrests come off, and seats slide forward to reach the rails where sand collects. You get back a dry-to-the-touch cabin, with before-and-after photos in the report.
01
What gets cleaned, zone by zone
Vacuuming opens the job and it goes deep: seats, carpet, trunk, door pockets, seat rails cleared with a fine brush, and the underside of mats washed separately with a hose. Hard surfaces follow — dashboard, console, HVAC buttons, screen treated with an ammonia-free product so the anti-glare coating survives. Soft brushes lift grime embedded in plastic grain, where a cloth alone just smears it around.
Fabrics and carpet then take hot-water extraction, leathers get a mild cleaner followed by conditioning cream, and vinyl is cleaned before receiving a matte protectant — never a glossy finish, which reflects off the windshield at night and attracts dust. Seatbelts get pulled fully out and scrubbed, since they hold collar grime and summer sunscreen. Interior glass closes the job, cold, last.
02
Hot-water extraction: the process
The machine injects a mix of water at about 140 °F and a controlled-foam shampoo into the fabric, then sucks it right back out with the dirt. The principle resembles residential carpet cleaning, but with narrow heads made for seams and seat backs. Organic stains — coffee, mud, juice — usually lift on the first pass; greasy stains need a degreasing pre-treatment before extraction, or they spread.
What doesn't come out: cigarette burn marks, bleach or acetone discoloration, and physical wear where fibers have snapped. We say so at inspection, with the vehicle in front of us, rather than promising a result no product can deliver. A wet seat always finishes with forced air — fabric left damp more than twenty-four hours inside a closed cabin grows that musty smell which costs more to remove than the stain itself.
03
Odors: treat the source
A smell inside a car almost always has an address: damp carpet under the mats after a winter, milk spilled into the console, an HVAC system whose evaporator condenses moisture. Covering it with a scented deodorizer just moves the problem three weeks ahead. The method that holds: find the source, extract or wash it, then only treat the air if needed with an enzymatic neutralizer instead of a perfume.
For the HVAC system, treatment goes into the vents with a foam product that travels down to the evaporator, where cabin condensation builds up. Tobacco odor is its own case: it soaks into seat foam and the headliner, and sometimes needs two spaced passes. Feasibility gets assessed at inspection — when a headliner is too loaded, replacing it costs less than treating it, and we say so before starting.
04
Holding the result between visits
A freshly done interior gets dirty through the floors first: rubber channel mats, emptied once a week, keep slush away from the carpet. The second habit costs nothing — wipe hot spills immediately, before the sugar caramelizes into the fabric under windshield sun. The third: vacuum once a month, before the sand works its way into the rails.
On products, the classic trap is the silicone wipe on the dashboard: it shines for a weekend then leaves a greasy film that grabs dust. A pH-neutral cleaner and a clean microfiber cloth do better, with no glare. Leather conditioner goes on twice a year, spring and fall — conditioned leather stands up to windshield sun that, in summer behind glass, easily pushes past 140 °F at the surface.
FAQ
Will the car be dry when I pick it up?
Yes, to the touch: seats always finish under forced air before pickup. In humid weather the core of the padding can stay slightly cool for a few hours — we leave a window cracked, or recommend warming the cabin when you get in.
Do you treat old, set-in stains?
Most of them, yes, with a pre-treatment before extraction: coffee, mud, juice, food. Bleach, ink or chemical discoloration has altered the pigment of the fabric itself — no extraction restores a destroyed color, and we assess that with you at inspection.
Do you handle leather as well as fabric?
Yes, with a different method: pH-balanced mild cleaner, light brushing, then conditioning cream. Leather never takes hot-water extraction — it gets degreased and fed, otherwise it hardens and cracks within a few summers.
Does the tobacco smell go away completely?
It depends on how old it is and which surfaces are involved. Fabrics and the HVAC system respond well to enzymatic treatment, often in two passes. When the headliner is saturated, replacing it is the real fix — we say so plainly at inspection before any work.
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