The Envirodri digs deeper then the vac, thats why, depending on the state of the carpet I agitate with the Envirodri before vaccy, and then afterwards as well, then prespray, then agitate the prespray and let dwell.
At the moment I am usuing Nemisis Super, and just as a trial I did a dirty lounge on Friday with just the Nemisis Super prespray. Only hot water in the tub. Nothing extra and I left the heat off, and both me and the customer were well pleased. I am sure MPower would have done the same result.