I had to tell ya'll what happened on my very FIRST smelt. After looking pretty good at the ww I put in the pot, there was a zinc ww floating in my pot. Do I have bad luck or was I in fact lucky that I saw it as I don't have a thermometer. Now I will be looking more closely at the ww's. Small pot, homemade ingot moulds, I ended up with 54 lbs in just a little while. I think I may be hooked!!