Have a bottle of XMT pad cleaner. I've used it on pads that were used with FG400, IS1500, SF4000, collinite 845 and BFWD. The mist that the sprayer produces is extremely fine and even when you squirt the crap out of the pad and think you are going through a ton of product, you set the bottle down and looks as if hardly any has been used. I spray the pad with XMT very heavily, let it sit for a few minutes and then start rinsing and squeezing it in the sink with hot water running on it. It does a wonderful job. I squeezed the excess water out and spun them on speed 6 on the PC to finish drying them and let them sit overnight. I couldn't tell the difference the next morning between a brand new pad and the ones I used XMT on. They were 3" LC hydrotech pads for what it's worth.