i put a little bit of dawn in a 5 gallon bucket, dilute it and let the pad sit for 10 -15 minutes then i hose it down, making sure i took all the glaze, polish, etc. out and let it dry. How about cleaning microfiber towels? I'm about to clean mine and i'm thinking let it soak in a mixture of dawn and warm to hot water, but very little dawn.
I got some microfiber cleaner from Pinnacle, you use a few capfuls in your washing machine instead of laundry detergent and throw all your microfiber and terry cloth in there. They come out soft and spotless. I got it from pinnaclewax.com I think that Scott at SMP sells something similar from Clear Kote or Poor Boys.
Supposedly it can be used in a bucket to soak PC pads as well, but I've never used it because I don't have a PC. You could also try soaking in Snappy Clean.