I bought an MFLB, it was working fine yesterday, but today there is a tiny rip on the side of the trench, is this why it isn't working great? I have charged both batteries, I insert one of the batterys and hold it in and I can see the orange flame, but when I put finely ground bud in it it still won't vaporize. You should be able to see some vapor, but it is clear that the ground up bud isn't getting heated up enough, what should I do? Should I clean the screen with isopropyl alcohol? This sucks, I have bud and I wanna be vaping not smoking from a pipe.