Yup; ya got that right.
Which is why, in addition to oil extraction, there is a point in most particle ball's life where you need to rejeuvenate the particles.
UNLESS you use Lanemasters new balls, The New Standard and the Yeah, Baby! which use industrial diamonds as the particles to provide the gripping surface. Diamonds may last longer than other particles.
I just read initial reviews of these two balls in the latest issue of Bowling This Month (A STRONGLY recommended read for all bowlers!) and they seem to offer extreme potential. I am awaiting my New Standard (as a gratis replacement for the Answer, which turned out to be an improperly manufactured ball).
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"We get old too fast, and too late, smart."