"Soaker" is a reactive formula that Phil came up with while he was running Dynothane.
A regular reactive ball will eventually lose reaction due to oil saturation. Phil somehow figured out the answer to that. There are reports of guys having 1000+ games on a ball, not cleaning them, and having no loss in reaction. These balls also have a break-in period of around 20 games. So for the first 20 games or so, your reaction will be not so good, and then the ball will come to life.
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It IS next year!