I have a couple of pheonix BC 808's and I'm getting a burnt taste. I used them new out of the pack and they worked great. They were about 75% empty so I put them away to refill later. A couple of days goes by, maybe 3 and I refill and now I'm getting a burnt taste from it. Anyone know what this could be from? Did the juice that was in there clog up the wicks? And most importantly, is it possible I burnt the wick and they can never be used again?