Following the above pre-treatment of the carpet we apply the pre-spray and agitate into the carpet with either brush type.  A “dwell” period of about 20mins or so for the solution to get to work on the soiling and then the carpet is simultaneously rinsed and extracted using our machine with both high pressure water and very powerful twin vacuum suction in such a way that the clean water no sooner hits the fabric than it is sucked back out along with the soiling.  This technique is the most common one used and with good agitation and solutions can remove real deep soiling.  Very good for restaurants (greasy) and high traffic areas.  Once again the pile is re-set and the carpet will be dry in 1-3 hours dependent upon drying conditions and use of air movers.