Are you talking about the almost like, white highlights that one or some of the colors have after being cold? A couple balls that I've gotten that were supposed to be solid colored, my blue vibe for instance, came looking almost pearlized because of this. Recently my Pink Panther was the same way, riddled with white swirls through it. On the Vibe it went away rather quickly, and from what I could tell, didn't affect performance at all. I actually kind of like the look anyway, so I'm kind of glad that it hasn't gone away on the panther yet.
As far as how to make it go away, I've never really thought about it. I've never tried to make it go away honestly. It just did on the Vibe. Keep us posted.
Matt