I too use baling twine - the used twine I cut from hay bales. It burns quite well. But before I use it, I hang it in a tree near the hives and let the rain wash it. This works well, because I always find myself looking for smoker fuel after I get to the hives. I have never found chemical contamination to be a problem. I do the same with burlap bags that may have chemicals from the potatoes they are used for. Larry Krengel Marengo, IL USA > You need to be very careful using baler twine for smoker fuel as most twine > is treated with chemicals.