Gotta rant about this stuff The most regretful thing I bought in 2018 is whitening toothpaste 🌸Use experience: During the sticking period, my mouth will secrete a lot of saliva, but because I am still worried that if I swallow it, I will swallow the chemical ingredients I don’t know what the sticker is. So I usually spit it out or stuff it in my mouth Tissue paper, there is no way to be more afraid of death😅😅😅 When using the first post, the sour feeling is not particularly obvious, just a little bit! I used the second patch later, and the soreness of this patch began to increase! In the third post, my mother really can't eat anything that is irritating, and she doesn't dare to open her mouth too much, for fear that the cold wind will make my teeth sore! The fourth post, I don't give up, let's post again, 🤤🤤Cold, hot, spicy my God! No, I can't hold on anymore, it's not a little bit sour, I don't dare to open my mouth at all, my teeth feel soft and unreal, I'm afraid that a cold wind will hurt my teeth! It really can't be used! If you get it, just put it on and eat dirt!