My post is from a year ago, before i had my CB.
The CB is slightly different than the FE (which is what my comment is based on).
The CB will continue to smoke and blow the air after you turn it off until all wood is turned to ash and the air flows that ash out. Most times it should be clean just from how it operates.
I don't start mine like I do my FE, I don't put pellets it. But I don't walk away either.
I just turn it on and let it go, and wait to make sure the fire lights. The CB does have a feature the FE doesn't, an "ignitor" button. If after 5 min or so I don't see anything and BEFORE the pot gets to full, I'll hit the ignitor. I've only had to do that once.