Professional Tile & Grout cleaning involves a multi-step process. I use an industrial strength, hard surface cleaning agent pre-spraying the entire surface area. Then, by hand, I scrub all grout lines using a bevel-cut grout brush to loosen stubborn soil deposits. A TurboForce high pressure cleaning wand is then used at 1000 psi and 230 degrees to remove suspended material. The surface is then treated with a neutralizing rinse to restore the pH balance. Average price is .50 sqft for cleaning and .50 sqft for sealing tile & grout after cleaning as an option. A $69.00 minimum charge for tile & grout service.