Been smoking them on the included USB passthrough and noticed that there's dribbles of juice that runs out of the mouthpiece end every 2-3 puffs. I don't seem to get this on the automatic batteries, and I haven't really used the manual too much to test it. Anyone else get this? Is it more because of the push-button manual style or is it maybe because I actually got some nice full cartos? Not a huge deal, but obviously not a happy experience having juice on your lips and tongue.