E-cigarettes, even the ones that are plugged into the correct charger and don’t explode, have a problem. Well, their users have a problem. Some former cigarette smokers who are used to flinging butts out the window when they finish a smoke are having trouble letting go of their nasty habit. The trouble is that metal e-cig cartridges are, well, metal, and puncture tires out on the roads. [More]