Step 1: find the source
We start by walking through the car and smelling each area separately — cabin, trunk, HVAC on recirc, engine bay. Smoke residue lives in headliner foam, vent ducts, and any soft surface. Pet odor is in carpet padding, seat foam, and HVAC condensation. Food and biological spills are in carpet and the padding underneath. Knowing where the smell lives changes the treatment. A trunk smell that we treat as a cabin smell will come back in two weeks. We localize before we touch anything.
