I accidentally left a glass dropper bottle of a minty/menthol mix in the car the other day, and for once it was actually warm and summer-like (haven't had much of that here this year); the car and bottle were quite hot..and I noticed the liquid had changed color dramatically toward amber from clear/greenish color it had been. Wouldn't you know, it tasted really nice, sweeter and smooth. It was a real mix-up..vendor liquid, capella, loranns, and vg..my usual menthol-mint mash-up! Am I on to something? Anyone done this?