Review on 🦷 Crest 3D Supreme Flexfit Teeth Whitening Kit with White Whitestrips by Garrick Prince

I'm very disappointed as these 3D Supreme strips didn't help me much. I only saw a small difference after 21 days of using it for an hour every day. I've used the cheaper Crest strips many times in the past with amazing results. My teeth are very sensitive and not once have my teeth become sensitive as a result. Most of the time my teeth hurt on the cheaper 2-3 days and I had to take a break. This is not the case with these, which makes me very suspicious. The only positive is that they have held up very well. I'm wondering if I just received a bad or expired batch even though the expiry date on the box was 2019.