Huh! Well, the other factors I can think of are body chemistry, and what you use to wash your clothes. I've got Levi's that are over a decade old, but the sweat

Huh! Well, the other factors I can think of are body chemistry, and what you use to wash your clothes. I've got Levi's that are over a decade old, but the sweat from my wrists will erode the edge off a Macbook Pro in a couple of years. You win some, you lose some