Not as far as I know, just wondering how much money is in pre vaccing. If I could get paid for it, I would do it more often. Maybe break out the pile lifter on occasion. Last time I used my pile lifter, it was on a strata condo building that had been using a host system for years. The carpet was severely impacted with host that hadn't been vacuumed out. I was pile lifting right by the mgr.s door and she came out and says "wow, that's much cleaner than what the other guys got it" I tell her, we are just vacuuming, we haven't cleaned it yet.