I don't. The first time you get a new ball is the cleanest the cover is going to be. For example, no scratches, gouges, oil soaked in, or belt marks. Although, I have seen and heard a lot of stories that the new Mexico made Brunswick's have come new with plug work on them, a grimy like material on the cover, mis-marked MB's, and cracked out pins. That is why i'm no longer throwing Brunswick, unless I throw my old USA made Inferno's.
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CHRIS FARLEY:1964-1997
JOHN CANDY:1950-1994
JOHN BELUSHI:1949-1982
"NO RESPECT, I GET NO RESPECT."-the great Rodney Dangerfield
InSite Bowling Products:2004-2008