Thats not unusual because oxygen has contact with the ball's material and chemical reaction may be forced, some balls are getting softer and slower like Balla Balla 5+6 or Gipfelstürmer, and some only slow down like Hölle des Nordens, BoF Czerwek 2004. But also my laquered balls of the two balls mentioned are so slow that I can't play them on pipes (concrete course) as I did some years ago.
Dirk
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Das Leben ist zu kurz, um hindurch zu rasen, wenn man nicht manchmal stehen bleibt und sich umschaut, könnte man es verpassen.
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