Yes, as Oskuposer said, keep your balls in moderate temperatures.
I have been conducting an experiment with mine lately. I have had several that cracked on me and they were all indoors balls, but exposed to air. I am now storing the unused balls in plastic bags since they come from the factory in plastic bags and will see if I have any that crack. So far (knock on wood), at least one year with none cracking.
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I am the Sgt Schultz of bowling.
"I know nothing! I see nothing! NOTHING!"
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