Most of those mouthwashes contain alcohol, in which THC is soluble. But, i think the alcohol has to be hot to get the THC out.
LIP Reviewed by LIP on . New beneficial effect of Marijuana discovered. When I smoke marijuana, I always brush my teeth afterwards to get the smoke taste out of my mouth. Before I smoked weed, I brushed my teeth maybe once every other day. Now, I brush my teeth two times a day. Rating: 5