What the hell is up with cool lighters? You buy one, it works great... until you run out of fluid. Then it stops working when you try to refill it. There is fluid in it, i'm refilling it upside down as the directions specify, but no workie. It won't light, and when you light it with another lighter you only get a sissy regular flame rather than the supercool jet flame. Am I using the wrong fluid or something?