Re: question on coals...
I belive you should wait for all coals to be fully lit. Ive noticed even exoticas give off some a slight amonia type smell unless fually lit. also if you dont wait for a coal to be lit you will more than likely get a masive migrain or headake due to incomplete combution and the production of carbon dixoide. I actually waite till mine fully ash over. Ide rather be safe than sorry since i already have problems with migrains that steam from a improperly done spinal tap.