Last year, I had installed a quadrafire Explorer II stove in my fireplace. It is a rear top mounted stovepipe that connects to a two foot piece of accordion stovepipe which then connects to 20 feet of chimney liner. There is very little room to do anything in the back and I can't figure out how to collect the debris once I brush from above. It appears the stovepipe connects to a separate chamber in the back and there is no apparent connection to the main firebox where i thought I could collect and dispose the debris. Any suggestions would be appreciated.