A guitarist friend of mine and I were talking about people who make strings go dead just by playing them. We named a couple of friends who have some type of corrosive properties in their hands or sweat that can make a fresh set of strings into old ones instantly. Case in point, we had a room-mate who would play one of our axes and afterwards the strings went dead. We talked to him about it, and he thought we were being silly. But the proof was in the pudding. Anyone have that ability to kill string instantly, or know someone who does?