Hot water and a little Dawn detergent in a bucket brings mine back to almost (Very, very close) its original state.
After cleaning, I wipe the ball down with a clean, wet cloth, then wipe down with alcohol to speed up the drying process on the coverstock. According to the Columbia reps I have spoken with, the ball should not be thrown for a few hours to ensure the entire ball has cooled to an acceptable level. The core can retain heat the coverstock does not for a couple hours after the cleaning.
Once cleaned like almost every ball I have thrown, the ball will react slightly different for a couple games.
Edited on 11/6/2005 8:06 PM