Been vaping for a few weeks now. For the last week or so, the corners of my mouth feel like they're cracking. I'm going through Blistex like crazy. Because I'm searching for the juices I like, I vape a mL of juice until it's gone then switch to another. Am I developing an alergic reaction to VG or PG? Dry lips in the winter is not unusual but I haven't experienced this before. Anybody heard of similar symptoms?