easy to use this brush for whitening teeth
the brush is easy to use, just make sure your teeth are as dry as possible . And after putting it on you teeth let it dry for 1 minute.  It does not have any taste. So nothing bad about this product. No burning on gums or lips. My teeth are whiter after 6 days use, twice a day. Im happy with it and will buy again.
Rating: 5 stars