I was reading about stuck grates on a stoker, and it dawned on me that I have been using ripped up hardwood flooring; oak, to start alot of fires in both stoves. Funny thing, they seem to disappear! None so far stuck in the grates or jamming up the shaker in the Franco Belge, pivot type. I haven't noticed any in the ash , but really havn't been looking either. They are the standard thin gun nails, but do you think the temps are hot enough to melt them and Puff, gone!