I smoke mine but I never can find a candle so I just do it with a cig lighter, I havent seen a diffrence. Anyone who does get itno this make sure you melt and mold in a well ventilated area. On warm days I pull my work bench outside and on cold days I open up the garage door. I try to mold a lot in one setting and then go in a paint and dress several lures. Also try to wash your hands and change cloths if possible to cut down on lead exposure.