We use punk wood, partially rotted wood. It is not rotted enough to be moist or the consistency of sawdust but still splitable. We cut off large round disks the width ot the length of your smoker body and then throw what we need in a box in the truck for this purpose. We live in Northern Utah where the climate is very dry and there is plenty of downed trees near our yard locations that there is always plenty of this very good fuel. Its free too. Derk Phelps Honey Farm ([log in to unmask]) : @ )