Interior

Use the extractor attachment with a wet & dry vacuum you already own. Spray your solution, agitate with a drill brush, then pull the dirty moisture back out.

That is the same method behind a professional interior valet, without the £400 machine. It will not work on a dry-only household vacuum.

Dust does not sit on the surface, it hides inside vent slats, seams and around buttons, which is why wiping with a cloth just moves it around.

A slim interior detail brush slides between the slats and lifts it out instead.

For a family car, once or twice a year for a full extraction, with regular vacuuming and a wipe-down in between.

Pets, kids and food spills push that up. The longer a spill sits in the foam, the harder it is to pull back out.