I have some bits of goat milk soap (made simply with lye, goat milk, and vegetable shortening) as well as some partial bars etc. left over from several times of making batches of soap. I was wondering if I could "rebatch" this soap and pour it into molds to make newer bars???? I try heating a little in the microwave (some shavings in a glass container) but that was NOT a good idea!!!! it bubbled over and looked like it was going to catch on fire!!!! So can I melt these pieces to form new bars???? I've been making goat milk soap about three or four years now! THANKS!