I am one of the few here that actually enjoys rebatching, but it depends on how much soap you have how much of a pain it is. I generally shred it (I also use the shavings from planing and bevelling) and heat it in the microwave with a little liquid (I'll often use milk or oat water or aloe when I rebatch) and a tiny bit of something which my skin loves, like kukui nut or emu oil, because all the goodness won't get lost in saponification. After it's melted (lumpy oatmeal) I'll add the fragrance and either put it in a loaf or individual molds. They're not the prettiest thing, but I find that the soap with additional oils which haven't saponified make a difference in how dry my skin feels when get out of the shower.