As you added more and more cotton candy you would begin to compress the centre under the pressure, and you would get some heating from this. I think there's a g

As you added more and more cotton candy you would begin to compress the centre under the pressure, and you would get some heating from this. I think there's a good change you would melt and cotton candy and eventually it would re-solidify into an enormous boiled sweet core, with a diffuse envelope of cotton candy around it.