Cleaning your car after winter: what salt and mud leave behind
Road salt and wet mud stay in the seams and under the car long after the snow has gone. What we clean in spring, and why the order matters.
What winter leaves under the car
Road salt and anti-skid chemicals work their way into the sills, the seams and the underbody. Wet mud packs around them and keeps them damp. A normal car wash cleans the paint and rinses part of the underside, but it does not get into the corners, it does not lift the caked-on deposits, and the water it uses can stay behind in places that never dry out.
Three places collect the most. The chassis rails and underbody, where salt sits under frozen mud and rust starts in the unprotected spots. The sills, wheel arches and fenders, where salt gets into welds and joints. And the engine bay, where road residue and dirt build up around the cooling area.
Why we use dry ice for this
We clean with dry ice on a Kärcher IB 10/15 L2P Advanced. There is no water, so nothing is left damp in a hidden corner. The jet reaches into the seams a hand or a lance cannot. And once the dirt is off, the metal is visible, so we can tell you what rust there actually is instead of guessing.
The clean surface matters for a second reason. An anticorrosion treatment only holds on clean metal. Put it over salt and mud and you seal the problem in.
What we do with the car
You drop the car off on Monday and collect it the following Monday. We take two cars a week. We clean it, look at it on the lift, and tell you what we found and whether a Dinitrol treatment makes sense. Cleaning on its own has no warranty. The 2-year labour warranty covers only the anticorrosion treatment, with free checks at 3, 6 and 11 months.
When to book
March or April, once the roads have dried and before the summer dust starts. The longer the salt stays on the metal, the longer it has to work.
Arctic Works is part of the BetterQA group.
Frequently asked questions
Does spring cleaning replace an anticorrosion treatment?
No. Cleaning takes off the salt, mud and old deposits. The treatment is what protects the metal afterwards, and it goes on clean metal. See rust proofing in Cluj.
What happens if I leave the salt on?
Road salt (sodium chloride and calcium chloride) attracts moisture and keeps the metal wet, which speeds up oxidation. Left long enough, it can eat through panels and weaken the chassis.