Pretty close. Both of my adult sons are straight and hate the smell of cannabis. Things have gone a lot smoother since I got a Vapor Bros. It was worth every penny! I don't need to use strong incense any more- I get to use my lightly scented Japanese incense and it works fine to cover up the last vestiges of the pot's smell. Hope you have the same luck that I've had. And you will also get rid of that morning cough as an added bonus!!! - Granny:hippy: