I have another question. The Phoenix's I bought have been working great for the most part. I have had 3 loaded up since I got them, and yesterday opened a 4th one. I've only loaded it one time, and it was doing great, but then suddenly the draw got VERY airy, and now almost no vapor or TH. Anyone know what happened to it? I didn't do anything to it, just it was fine, then suddenly not fine.