Product Description When you want to improve the consistency of your ball reaction, grab a bottle of That Purple Stuff professional grade bowling ball cleaner approved for use anytime by the USBC.Features:That Purple Stuff not only breaks down dirt and oil from the lane; it also restores the tacky feeling that your ball had when it was new.Because it bonds to the subsurface of the coverstock you can feel that the ball is tacky even after bowling with the ball. In fact, you can hear the ball squeak with your hand once its clean.