I am thinking that the balls' resin or other material dries out. All of my balls that have cracked were exposed to the air. Maybe that is why most balls come NIB inside a plastic bag? I will be storing my balls in plastic bags to see if that helps.
Now, if anyone has had a plastic ball crack 360 degrees like these, that would prove me wrong.
I am the SGT Schultz of bowling.
"I know nothing! I see nothing! NOTHING!"
I just want 2C was'zzub.