OFFICIAL: "Sir, I'd like to know if the cleaner you're using is approved for use during play."
ME: "Taste it and see for yourself."
charlest,
I, too, buy my cleaner by the quart, and just use another bottle (from an approved cleaner) because it fits in my bag.
I really don't see the huge advantage someone might have over me, even if they are using something illegal. The way I look at it is this: If someone feels that desperate then they have a bigger problem than whether or not their ball is clean. Chances are they can't hit their target three times in a row or something else...
I, however, resent the idea that I would need to ask permission to clean oil, dirt, or pizza off my bowling ball. This is just silly, and will only be enforced at USBC Nationals.