I have found the same question, but the answer wasn't definitive enough. I'm worried that if I smoke even an hour after I use the gel (it says to do so for 20 minutes) my teeth will instantly go completely yellow again, or be even worse because of the enamel sensitivity. I would like to know if it gradually reverses the effects of the gel (like it gradually strained the teeth in the first place) or instantly? If instant, how long should I wait for this sensitivity to go away?
I bought a at home teeth whitener and i was wondering how long after you do the whiting do you have to wait to smoke a ciggerette? The process is only 30 mins but i dont wanna make my teeth more yellow then they already are