Okay, so I'm the type of person that takes great care of their teeth. I brush them 3 times a day, floss, periodically uses mouthwash, I don't even eat sweets much at all. But I chew about a pack of sugarfree gum a day. If I dont go through a pack, then i will chew one piece for hours. I have a fee cavities now! Why?! Is it from the gum? Over cleaning of the teeth? Some disease? Sensitive teeth?! I need to know! 