Sorry, I should have been clearer. I was talking about paraffin container waxes. I've tried a bajillion of them. J-50, J-223, IGI 4786, CW129, Comfort Blend, IGI 1945/4630, and a few others. I ALWAYS got soot, and with most of them I got horrible smoking while burning, even with the wick trimmed. The smoking was the worst with the 1945/4630. The soot/smoke occured in all of these waxes when I used 3% AND 6% FO. When I said soy is cleaner burning for me, what I meant was that the jars are cleaner. Soy may put off "white" soot, but I can't see it. I don't like black soot showing up on my containers. I won't sell them that way.