this is my first year with my wood boiler so i am trying to keep an eye on things, i would prefer not to have a chimney fire. i run a brush through my chimney about every two weeks or so to be safe. all i ever really see is basically a very dull dust inside the pipe. in fact i clean out the pipe from my boiler to the breeching pipe with a toilet bowl brush. i really dont let my boiler idle, just load it up and let it run flat out until it runs out of wood. is the dust i see a pre-cursor to creosote, or is this normal for regular burning? what are the first signs of creosote? i always hear of some liquidy type goo running out from pipe joints. i have none of that. help the rookie out. this is looking in through my baro.