I'm having learning curve issues.I bought a Liberator mostly to scrub nasties, but I've also used it for encap and setting pile. I bought a couple of tubs of the sponges to play with, carpets look great in some cases, crappy in others. I'm vacing, scrubbing in the prespray, scrubbing in the sponges, letting it dry and vacing up. Is there something I'm missing? On the plus side - if I get any wicking on a job, this seems to end it., and I've had some good comments on back to back moves.HELP!