A cheap gimmick
This is just a gimmick. I had my teeth cleaned last week and brushed two rounds with my sonic tooth brush BEFORE using. ALL of my teeth turned blue. I had to brush two kite rounds to remove the dye. I am 54 and have only had two cavities in my life, so I know how to brush away the plaque. This has to be a gimmick.
Rating: 1 stars