I just did a three bedroom house with staircase and the carpets were fairly old olefin berber. I used E-steam Suspend Free Prespray, and Prochem all fibre rinse. Used light agitation (Host T6 as CRB) and plenty of dwell. I found I really had to slow down my rinsing and often double rinse before 3 or 4 dry passes. It seemed like the dirt and soil was really sticking to the carpet. How could I improve my process or chemistry to make this a quicker job? I was thinking of using e-steam attack but I couldn't find my measuring scoop, so I used suspend free as directed. Job took 4.5 hours including walk-through, pre-vac, prespray, agitation and extraction using a truckmount. Need to get faster and better - too much work and the results weren't quite as miraculous as I had hoped.