Hot Knife

Hot knife is an old method of smoking concentrates that predates modern dab rigs. It consists of heating a metal knife (for example over a stove) and then pressing the concentrate against a hot surface, causing it to vaporize instantly. The user then inhales the vapour via a tube or directly from the knife. This method is simple but less effective than modern dabbing technologies because it does not allow precise temperature control and may cause loss of terpenes and cannabinoids.