I had some brown stains between my four front teeth on both the bottom and the top. I got them cleaned at the dentist with some kind of powdery water that they sprayed on my teeth.
It's now two weeks later and I can see that the stains are starting to come back. Just between my teeth, the surfaces are fine.
I'm confused about what's causing it. I brush twice a day, floss once a day, don't smoke, don't drink tea/coffee/anything that could stain my teeth, just water, green tea and orange juice.
No matter what I do, nothing seems to stop the stains from coming back.
Any advice?