Patience? 4

I bought this pen since there were many positive return. Delivery was super fast, especially with the premium account haha.
In the package, there is only the pen and a mini record but not the box as pictured.
I tried the pen for 3 days (4th use today) and still no results. Not even a little .. Maybe they are my teeth the problem, yet they are not so yellow it. I will continue to use it for several days, and if still no results, I'll be super disappointed.
Otherwise, the application is quite easy and not very long tps pose, but it's hard not to get too close the mouth not to remove the product.