Got Tired of looking at my name! said:What type of wood do you burn right now? How long has it dried? Yes pitch can be a real problem in wood. Burning to cool can creat a mess in the chimney and make for a lot of cleaning so can wet wood. If it isn't split while drying and let sit for minimum of a year 2 if possible it can leave a lot of creosote behind in the flue.
Pete
Why? In dry conifers, I can see it creating some fast heat, but how is is 'bad' for the chimney? Cheers!