Im trying my first WW ingot session. I was on about my 3rd handful of WW and the melt started to look like it was clumping together. I stirred it around and it looked fine. I am using a stainless steel bucket that is kinda thin so Im trying to keep the heat low. The next handful of WW clumped immediately so I thought maybe the heat is too low? I turned the heat up a little and stirred again. It went away again but Im worried that the thin bucket is allowing too much heat transfer to melt the zinc WW's? Can anyone tell me whats going on?