I received some new boge 510 LR cartos and the first one I filled tasted horribly burnt. Nothing like the juice that was in it. I've used quite a few with no probs, so I don't know the symptoms of a bad one other than it not working. It gets very hot within just a few seconds of use, nothing like any of the other ones I've used. I filled a second one from the same box and its working fine. Is this a sign of a short/bad one. I know it was not dry. Wasted my favorite juice on it too 