I prefer Listerine over other mouth washes because it makes my whole mouth tingle, and I see that as a sign that it has begun working to get rid of bad breath and is killing germs that cause cavities. I have thin enamels and have had cavities needing filling quite often. A little goes a long way, as I can use it half strength and it will still be effective if I use it as a mouthwash and swish it around in my mouth. I use it in an unusual way, too. I have a special need to use an effective germ killer on my teeth because the enamels were all damaged in childhood by metal braces, and the damage is right at the gum line, and cavities there undermine the whole tooth structure. I use it after scrubbing with tooth paste to disinfect my teeth because I scrub the germs away that hide between the teeth and in the gums which I missed with regular brushing. I dip my tooth brush into a cap of full strength mouth wash and scrub my teeth with it, concentrating on areas between teeth and at the gum line. I have been doing this for a year now and have noticed that my gums are a little less recessed and my teeth less sensitive. I also have fewer cavities and fewer deep ones. Before, I would have sudden deep achy pains when eating hot or cold foods, plus a tendency of my gums to bleed a little during brisk brushing. I find if I use this product as I described here, I have less tooth pain when eating, and my gums stopped bleeding. This does not substitute for my seeing my dentist, however, but it makes the time between those visits more pleasant.