OOPS! Posted that a bit too soon! I, also, do not use tobacco. I've toked for 40 years, and yes, it clogs up your lungs! BUT two weeks after getting a vaporizer, my lungs were clear! No residual effect from toking for 40 years! Cannabis smoke is the problem- not cannabis! Get a little box vaporizer- they work well and are not THAT expensive. - Granny:hippy: