I have a set of pool balls that I take where I play often. I switched from the Centennial cue ball to a cyclops cue ball as some mentioned on this site that it has a tendency to stay cleaner than all other cue balls- I use Master chalk and clean the cloth on the table I play on prior to each session. I do find that the Cyclops cue ball stays cleaner, picks up less temporary and more permanent markings, and plays very well. I thank those here who gave that advice. I find a BIG difference in the amount of cleanliness retained by the Cyclops cue ball.