My initial thought is that since it was in the center of the hot pad and the others were surrounding it, i am assuming it was hotter in the center.That's interesting. I've zero knowledge of the chemistry involved that would make that one vial special, but interesting observation. Curious to see a photo of the vials side by side.
I could experiment by cooking another one in the center? But im not sure if it getting darker means im ruining it.
not that the others that are crashed are any good, although im told its good to use once melted.


