Why Your Briar Pipe Develops Sour or Foul OdorsPipe souring doesn’t mean merely that you have "dirt building up." It’s the result of an intricate series of chemical and biological reactions occurring quietly within the wood fibers. Your tobacco makes smoke, of course, but when you light it, you also make more than just smoke. You also make tar, nicotine oils, organic acids, and a lot of water vapor....
