Hello folks. Another question. On a previous post I asked about why I'm getting carbon/ creosote build up on my flame guide and burn pot on my P68. Someone suggested cleaning the little vents down at the bottom edge of the flame guide. I never did this before and they aren't mentioned in the owners manual. (Big surprise!) I tried cleanin them by by sliding a zip tie down in then and got it in about 4" deep. Is this the best method and what are these vents for? Thanks, Mark