I looked into this once before and eventually intend to do it. They said the best way was to create a double boiler, a bowl placed over a pot with water in it. This kept the heat controllable. Put the wax in, when it starts to melt turn the heat down slightly until all is melted then pour into container. Put someplace cool like a basement so the different parts of the wax don't have time to settle out before it cools.