I have really chapped lips since I started too. From my Googling I thought it was because of the propylene glycol, which takes water molecules from the surrounding air, including the mouth and lips. I've also been sort of dry in the nasal area. I'm not sure why this would be happening to you if you're only using vegetable glycerine though... Maybe just the heat of the vapor? Or the nicotine? I know if you're like me and drink lots of coffee and alcohol, you HAVE to drink water. I'm also applying lots of chapstick and lotion because I feel parched!