For a dull ball used on heavy oil, Clean and Dull is THE cleaner to use. I doubt if there's any need to do an oil extraction after just 9 games, but the ball should ALWAYS, EVERYTIME be cleaned before being put back in the bag. Once it's in there, any oil laying on the surface will be absorbed, even with the Cell's special cover, designed to absorb more slowly.
The best everyday cleaner is still Lanemaster cleaner. SOme other good ones, in my opinion, are Neo-Tac's Liquid Nitro, Brunswick's Remove-All, and Black Magic Rejuvenator. One of these should be carried in your bag and used with a CLEAN cloth to clean the ball's surface before putting it/them back in your bag.
AFter a heavy oil tournament or after 15-25 games use of a dull ball on oil, you should clean it with Clean and Dull. It is a 3 step process best done at home. It requires a towel with C&D, a wet towel, then a dry towel to be done right.
An oil extraction is needed every 50 - 100 games depending on circumstances and your seeing any degradation in ball performance.
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