I recently discovered that wood shavings are the best long lasting fuel for a smoker. If there are any toxic fumes in the fire starters I use, they are long gone by the time I use the smoker on the bees.
Someone made a comment on youtube about toxic fumes. Is any smoke free of chemicals? No matter what “clean fuel” we use in our smokers, we wouldn’t want to breathe it in ourselves. Therefore we should only give the bees enough smoke to do the job we want the smoker to do.