BAIT AND SWITCH. Dual process cleaning describes the process of shampooing or heavy
preconditioning, followed with hot water extraction cleaning. Unfortunately unethical carpet cleaners often use duel process as a bait and switch technique. Here's how it's done: First, they "bait" you with a basic cleaning (single process) at an unbelievably low price. Then, when you call, they try to "switch" you to more expensive dual-process cleaning. If you don't fall for their switch and choose their basic service, you'll likely receive poor workmanship using little or no chemical and they will not guarantee their work.