I brush twice a day, i use interdental brushes and i generally regard my oral hygeine routine as enough
Im not much of a smoker ill smoke socially only these days which is not very often anyway
I do frequently dry herb vape through a water bong as my main method, yet i still end up with the brown stains
The dental hygienist does seem to be able to remove the stains upon every routine 6 month clean/polish
They look good for about 3 months and then it starts to show again