just cuz it's burning doesn't mean it's smoking you know.... the very top layer of your bowl gets pretty much incinerated...

get a peice of wood, put a lighter to it and hold the flame there and watch it burn... it won't smoke, or if it does it's extremely minimal, then take away the lighter and watch how much smoke pours off... when the flame is still on the wood, the wood is burning, but very little to no smoke is coming off... it's not like the smoke is just hanging out on the wood waiting for the flame to go away so it can rise into the air...

there is a big diffrence between burning and smoldering...