After using one of my polishing pad for a small while today, I began to notice a small dip, forming in the direct center of the pad. I hear of people using thier pads for a very long time, but this has me a little worried. What if, fresh polish gets caught up in the little "pocket" and releases at the wrong time, maybe when your finishing up and the polish on the panel has already been broken down, would'nt this leave hazing? Maybe with sufficient pressure on the machine, the "pocket" doesn't exist. Either way, I would like a second opinion or two.