I have used CPR, can't tell you how it works, just that it does. Here's what Columbia says about how it works:
"Our patented synthetic polymer formula acts like a microscopic sponge on reactive and particle balls. It absorbs dirt and oil from the ball's millions of pores. When the CPR particles have done their job, your ball is new and fresh, with a revitalized hook." Taken from the website.
I leave it in the bag for about 2-3 hours, usually in the sun on the table or floor, if I have room. I've done my Hawg Wild, Hot Rod Hybrid, No Mercy, Toxic, my wife's V2 Sanded, No mercy and No Limit with it. Sold several to customers who swear by it. I normally use the sun method to extract the oil on my personal stuff, or CPR and the sun. Not sure which is better CPR alone or the sun but together I have no problems at all.
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az guy aka: R & L Bowlers Pro
rlbowlerspro@cox.net
www.rlbowlerspro.comLooking for treasures ? Take a look at my wife's ebay store
http://www.ebaystores.com/Pitas-Place?refid=store