I use Kleenrite self-neutralizing (9.5-6ph)...works fabulous on synthetics
That's a very good product. I've used it before. if you're using an extractor to clean, Chemspec Powdered Upholstery Cleaner is also an excellent choice. Ph 6.5 I believe.
I use my crystal dry with 100% cotton towels, my cyclo and that's pretty much all I need. If need be, but rare.... my mini extractor with plain rinse water. I never use an acid rinse in my extractors as acids stop the soil removal process. With Crystal Dry, I never have to worry about rinsing, yellowing, browning...Nuthin'!