Sensitive teeth? Start with low-peroxide gels, shorten sessions
https://privatebin.net/?0c4bb36ae68cac06#AnUuXu38rY7cBezEsHpDNYNLNU3ZCoMFzVgeVaknnygU
Delicate teeth? Start with low-peroxide gels, reduce sessions, and pre-treat with desensitizing toothpaste for two weeks before beginning whitening.