Before I started rinsing mine with water after smoking them, they smelled like old ashtrays. But, after rinsing with water, wiping out the bowl with a paper towel, and then a pipecleaner down the draft, they don't really have a smell at all. I mean, I am sure that a highly trained hound could probably find the pipe in the dark, but they don't have that acrid ashtray smell at all anymore.