So, Before I began to melt I read about making sure the weighted candlesticks have all the filler **** in the base removed before tossing in the pot. I also smashed out the glass in the bottom of numerous steins and tried to remove as much of the goop used to hold the glass in place. everything was going smooth till the 3rd pot when some of the candle base filler material must of gotten in there. I lit off the smoke coming off pot and it readily ignited. Sorta smelled like burning pine trees. Anyhow, I poured that pot out on a big piece of plywood and let the remnants of the filler substance smoke off the now empty pot. I made four or five more pots after that no problem. I tried to remelt the pot from previous and it seemed to clean up well after the filler substance burned off. I couldnt remove it with the ladle even though it was floating on top of the melt. So this a.m. I went to put the new pucks away and noticed that many of them have a yellow tinge to them. It is not just surface discoloration. Is it the mystery filler substance or can you heat pewter up to high that the metals separate or crystalize or something? Inquiring minds want to know.