Maybe reduce the pieces in size and let them dry overnight or for a full day. If it still won't stay lit, I'd use either a hand grater or a spice/coffee grinder to reduce the size further. I did this with the superb blend that is notoriously hard to keep lit, McC's Dark Star, and it worked like a charm. I've enjoyed the whole lovely tin this way, burning as evenly and well as anything. It really delivered the full keyboard of flavors in this classic Virginia blend. I had a sample of Briar Fox and found it a little too mild for me, so I jazzed it up with a stronger burley and that suited me better. For whatever reason, it burned alright for me.