I know it's advised to keep hydrated when vaping, and this doesn't happen all the time, but I noticed with a few juices that it kinda dries out my tongue or makes it burn. I only vape with a 50/50 mix right now, and I know that PG can irritate some people, but I have been doing 50/50 consistently for about a week so I wouldn't expect it to start bothering me now. It doesn't happen with every juice, just 2 so far. I also know about tongue bite from smoking because the nicotine gets on your tongue, but as far as I know no juice is getting on my tongue, at least none that hasn't already been vaporized. What could be the problem?