I just purchased a Grillpro propane smoker today. I'm worried something is wrong because the flame is very yellow, and it's having trouble heating up. There is some blue in the flame but not much. A picture is worth a thousand words so I recorded a quick video: It seems wrong but I'm not sure. Can someone confirm? If so, what could the problem be? It's brand new, I unpacked it and assembled it today, so I don't think there are any cleanliness problems.