I am trying to do a sun catcher project using soft lead came. As I wrap each piece and then try to solder the pieces together, the came just melts into big holes. I've never solder with the soft came before, but looking at the project, that's what it uses. I have a sun face circle medallion wrapped in the came, with nuggets wrapped in the came with the ends coming to a point looking like sunrays. I tried using a lower temperature, but that didn't help. How can I solder this soft came properly????