Hey everyone so I just purchased a new 6.5 gal glass carboy, finally upgraded and when it got it from from Bell's Brewery it looked like their was dust particles inside the carboy so I grabbed some pbw and a carboy brush to clean and it would not come off, I rubbed the outside clean too and have come to the conclusion that the little "dust" specs are in the glass, is this totally normal or do you think there is something wrong? I don't know how else to decribe it other than little specs separated out throughout the carboy. Help please