When sucking on a piece of hard candy recently, I needed to take a pill and spit out the candy into a piece of orange peel I had lying nearby on my desk. I promptly forgot about the candy and it remained lying in the bowled surface of the orange peel for a day or two until I rediscovered it -- but it had melted in the peel, despite the room being of ordinary temperature (~73F).
I decided to test it out with a piece of un-slobbered candy of the same kind (this
in orange flavor, ingredients: sugar, corn syrup, citric acid, artif.flav, FD&C yellow 5 red 40.) and a day or so later it also had melted inside the bowl-shape of the peel.
I'm not sure what good or evil could come from knowing this, but any idea why? The candy had set in the same room for 4+ weeks without melting, but melted (or liquefied, broke down, etc) inside the orange peel in a matter of a day or two. It could serve as a technique for melting candy without using any heat source, although it takes a long time..