I've had problems telling if I had good smoke or not when getting my smoker started at night or in the early am. Not enough light to really tell. Like another said, just putting my hand over the exhaust is the best way for me to tell if I'm burning clean. If my hand smells like a campfire I wait. If it smells like smokey goodness I throw my meat on. Although if it smelled like a burnt shoe I'd be at a loss. Best of luck getting it tuned in!
WSM 22 ~ WSM 18 ~ Maverick ET-732 ~ Flaming Fast Thermapen ~ Weber SS Performer ~ Weber 22 OTS ~ Weber 22 OTS ~ Weber 22 OTPlus ~ Weber 22 OTS ~ Weber Q300
When all else fails just ask yourself, WWGALD???