I have either just used Arimith ball cleaner and done them by hand or had my local pool room or billiard store do me a solid and do it for me as a courtesy for my business. I came upon a video that espoused putting a half a cup of bleach and a half a cup of water in a sink. Let them sit for a bit and then use a magic eraser and work them over and voila they look just like new. I have a set of Centennials and the last thing I want to do is ruin them if this is crazy. Anyone know anything about this cleaning method? Thanks in advance for your comments and knowledge.