In a lifetime of analyzing upholsltery cleaning claims, I've found the one thing that creates the most problems by far:
Over wetting/slow drying
I know guys who use the worst of tools and the unsafest of chemicals who "get away with a lot" because they control how much water they put down, and even more importantly, speed dry the fabric afterward.
Make no mistake: Prespraying a pH 12 product through an in line sprayer and extracting with a carpet wand is not the course of wisdom no matter how many fans you own, but I do see guys using things I wouldn't, and not getting in trouble, because they do what Nat did here.
....and if you don't know Nat Ismaeil, you should:
He's one of the most intelligent, diligent, humble, ethical, and kind people that I know.
I want to be just like him when I grow up
