Dry Throat & / or Sore Throat - PG is a humectrant & when vaping the back of the throat gets coated. You can find that after sleeping, you wake up with a sore throat. Things that can help are drinking a glass of water before bed, gargling with a mouthwash to cut the PG coating before bed, drinking water throughout the day, using hard candies & drinking liquids with honey liquid thru the day to keep your mouth damp.
After my 2nd refill, probably halfway through, it got very hot and no vape, I kept doing primer puffs but no luck, removed the tank and reinserted a few times, no luck, refilled no luck, laid it down for about three minutes and it returned to normal for another refill or.