This is my natural gas hot water heating boiler flame. It lights up initially with a fair bit of orange flame, and after 10 seconds or so settles into what's pictured. I believe it mostly looks as it should, but there are several parts of the flame burning orange. How bad is this? I know I should clean it, which I'll do in the spring. This doesn't need immediate attention does it? I have a CO detector nearby, reading 0 all the time.