I love mouthwash. It's the icing on the cake of dental hygiene, which I take very seriously. I had no clue that I would be a person with a sensitive mouth. This caught my eye because I'm an avid coffee drinker who doesn't need a whitening treatment at a dentist office, but I could use a shade lighter. I used it before bed, and it tasted fine, fresh breath... but woke up and my mouth felt very dry. I drank water and my tongue felt almost numb. It was strange! Then throughout the day, the inside of my cheeks and lower gums started peeling! It was not a good day for me. I threw the mouthwash away right away.