I was just down in the basement, racking my Crushendo Syrah. I looked at the carboy bulk aging a Cab/ Temp LE. I noticed a little mold in the airlock. Well, I quickly sanitized a fresh one and switched them out. Do I need to freak out or will it be ok? I do go and check on all things wine almost daily, and this is the first problem I've noticed. Thanks for any comments or suggestions.