Hot water only? But it's not getting it clean... Why not use soap?
The point being is that some soaps can bind with chemicals in the coverstock and do as much damage as the ball being saturated with oil.
I will add some soap sparingly to the mix towards the end to break up the oil, but I will not let the ball sit there and soak in hot, soapy water for very long. After the soap is added I will then rinse the ball off using water as hot as I can tolerate.
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"A word to the wise ain't necessary -- it's the stupid ones that need the advice." Bill Cosby
"Never argue with an idiot. They bring you down to their level and beat you with experience."