Suggestion:
- These balls absorb oil SUPER rapidly. Waiting til you get home to use a cleaner on it is too late. Heck, waiting til you change your shoes after bowling may very well be too late. Cleaning it should be the first order of business. In fact, I 'd strongly suggest you wipe it off every time you pick it up.
- before putting it in the pro shop oven (Revivor?, Rejuventor?) next time have them sand it down to about 320 grit. Make sure there's no oil coming off the ball before taking it out of the oven. Then asking them to restore it to the original 4000 grit Abralon finish or wherever you've had the ball.
- 4000 Abralon is fairly fine finish. Rougher or older lanes can chew up or gradually change the surface. Even newer synthetics can change 4000 grit to rougher. Refresh the surface regularly. That can be every 20 games or every 40 games. Depends on the ball, how you throw it, conditions of the lanes, etc.
- Make sure the amount of oil in the house you are bowling has not changed since you started using this ball. Perception is everything. Maybe the weather has changed drastically maybe they stopped stripping the backends as they should. I can't tell but it is a distinct possibility.
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"None are so blind as those who will not see."