Hi, I don't understand what changed the past couple days, but the vapor tastes like menthol. It has a very minty flavor; there is a very cool sensation in my mouth and back of throat from the vapor. It's very noticable in the begining and less near the end. I've been putting the same exact thing in my pipe for a month. So.. something must be happening to me?! I'm rather new to this, been vapin for about 3 months every day as often as I can. Is this a sign I need to lay off for a while?