Hot water extraction cleaning, known as "steam cleaning". This kind of cleaning doesn't actually use steam but instead uses high pressure to push very hot water, along with a cleaning solution into carpet. The resulting moister is then removed via suction, and the carpet may need 24 hours to fully dry. This is the method recommended by most carpet manufacturers for deep cleaning and is often required of homeowners to keep the warranty on their flooring valid. And we do this with our truck-mounted equipment for the most powerful suction.