Had a decent fire going, nice hot coals left behind, got some splits from my wood pile,( since last november, stacked, split, ) mixture of maple, oak, and who knows what,-- however checked on ends dry, etc. So I open up the air inlets, rake hot coals to front , place one of these splits on coals, close the doors. Go about my business, after a while I check to close air inlets, and notice this split just barely burning, no hissing, no spitting, a charcoal type burn outer bark sides, but almost untouched wood surface where it was split in half. Hmmm, play with hot coals reposition wood, close doors, same thing. frustrated, I add a half of super cedar, nice hot roaring flames, close doors-half hour later, same thing with wood, what the...! I know, what kind of wood is it, who knows but its dry, checked on ends, and when ya whack em together sounds like beltran hitting a homer! Whats happening?