Use a 50/50 mix of Simple Green and 91% alcohol. Alcohol won't clean deep enough and Simple Green will leave a film on the ball. But mixed together it will float out the deep oil and leave the surface squeaky clean. Both products are USBC approved. Really worked well on my Venom and it is reacting much more like new.
Oh yeah, it's pretty cheap too! 32oz Simple Green and two 16oz bottles of 91% alcohol = 64oz of ball cleaner for less than 8 dollars. Hope this helped.
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