What exactly does the candle do for fluxing.My Lee pot just starting leaking,and making a pain of everything,so I got all the old lead out,got it cleaned up a little,after 5 years.Gonna try it out again when my Mustads get here for my steelie jigs,and have some good soft lead,I'm gonna pour into ingots and mark them.Just to try things out.I'm just trying to do things correctly for now on.