Good tips, I have been using these whitening tips for almost a year (this is the fourth set, I change every three to four months). What I like: firstly, the brush immediately determines what kind of nozzle and sets the correct mode, secondly, the brush remembers each nozzle and remembers how much it is used, and thirdly, they brighten teeth well. I use bleach twice a day. Yes, the effect is certainly not what I thought, but the volume of coffee and black tea that you drink plays here. With daily coffee consumption (2-3 cups per day), they do very well. Minimum action and maximum benefit. Very good nozzles.
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