DubOudh
Aster Oudh
I definitely learned never use chunks. The wood burns too unevenly and leads to scorching/burnt scent like firewood.I either char the wood or don't smell anything. I've posted pictures before of some of the woods I have, and was assured they should smoulder, but somehow I just can't get it right, especially with chunks. People have told me to warm up the wood first, then slowly increase the volts, etc....and yet I get nothing. I wish I could figure it out.
Saying all that, I have often burned wood and got nothing from it as well, perhaps it's just a piece that has no oil. It's possible.