What professional steam cleaning means in practice
The industry term for what most people call steam cleaning is hot water extraction, and the distinction matters because true dry steam and hot water extraction do different jobs. Hot water extraction delivers heated solution into the pile under pressure and immediately recovers it through a vacuum slot in the same wand head. The heat lowers the viscosity of oils so they release from fibre, the pressure carries solution to the base of the pile where the soil actually is, and the recovery slot pulls the loosened soil back out. Temperature is the variable most operators get wrong: too cool and oil stays put, too hot and synthetic fibres can distort or set a permanent texture change in the traffic lanes.