RE: the alcohol issue to clarify ... Yes alcohol will clean, but not advisable since it may affect the coverstock. In the case of denatured alcohol ... it might damage the coverstock.
The extender polish is NOT a cleaner. It is a polish used when you want to get lenght. Ebonite advises to use the factory finish polish afterwards to get bite again.
My personal tip: just spray a bit of the energizer clearner on your towel. Wipe after every shot. I have balls that have 4000+ games on them and they still hook.
If you want to do the hot water bath, do it only when you notice a loss in performance.
Look into Neo-tac (?) products also for a higher level of cleaning (every few months or so ..-)
regards
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DARK BEER IT IS THEN!