Why am I finding chunks of 'crystalized' mouthwash on my bottle anyways? Â

Why am I finding chunks of 'crystalized' mouthwash on my bottle anyways?  

answers 0:Why does this happen every time I use my bottle?answers 1:I like oral hygiene, just like the next person, but, what else are you doing?How about a good floss?:-)answers 2:the solution gets on the outside of the bottle, and the liquid in the mouthwash evaporates, leaving the solvents exposed in their solid phase.answers 3:I don't know why but that reminds me of that cinnamon schnapps my buddy and I used to get. It came in a bottle and had it's own shot glass. The liquid crystalizes inside of it. If you know what you are doing you can open the bottle and eat the stuff like rock candy. I know this has absolutely NOTHING to do with dental hygiene. but yes, I noticed that on my mouthwash bottle as well. Again it made me think of something else that puzzles me.! FOR YEARS the dental association in conjunction with the government pushed flouride. They put it in our drinking water and everything else. NOW all of a sudden they are starting to make dental products that don't have fouride in them? ARE they now starting to realize how bad flouride is for you? Or are they finally fessing up to what they knew all along?...