Lighter and a wet paper towel.
I tried this but with a kitchen torch. I melted and burnt 4 pipes. They still smoked but looked awful. I cried at first but I live near the Museum Of Contemporary Art in Chicago and sometimes smoke on their steps. A few of their patrons saw me smoking and thought I was performance art and the evils of smoking. I sold those pipes for $6,300 and signed some autographs. I tried melting more pipes and selling them again but security chased me out for not giving them a cut last time.