I have been running my boiler for a few days now, but surprised by the amount of Creosote build up inside. I know that burning the fire hotter is better (I'm trying to do). Is there other options to limit the buildup? Anything I can burn to reduce the buildup inside. I can get my chimney & piping cleaned, but what is the best way to handle this black glob inside of my stove???? Thank's in advance.