Professional carpet cleaners have many treatments and methods they can turn to, depending on the type of carpet fiber they are cleaning. Although several of these approaches have their place in the carpet cleaning industry, hot water extraction (aka warm water extraction or steam cleaning) is considered the best for deep carpet cleaning. After a thorough industrial strength vacuuming, warm or hot water – often mixed with a cleaning agent — is sprayed into the carpet pile. A powerful vacuum (sometimes truck-mounted and connected to the house by a long hose) immediately sucks up the solution, along with dirt particles that have been dislodged, and delivers it to a holding tank. A final rinse, followed by a second pass of the vacuum, removes any remaining dirt or remaining cleaning solution.