Hahaha! To funny! Lol!I've been wondering this too! Thought it was proprietary, but I looked into it a bit and found the ingredient list:
Fillet of a fenny snake,
In the cauldron boil and bake;
Eye of newt, and toe of frog, Wool of bat, and tongue of dog, Adder's fork, and blind-worm's sting, Lizard's leg, and owlet's wing,
— For a charm of powerful trouble,
Like a hell-broth boil and bubble.
Double, double toil and trouble;
Fire burn, and caldron bubble.
propylene glycol