First year burner here with a ashford 30. I want to clean my chimney myself just a few questions. The chimney Is about 16 feet total with 2 45s. My plan is to clean it from the bottom up. Do I need a a metal or a nylon brush. My plan is to remove the double wall pipe from the stove and remove the 2 45s. Then it's just a straight shot up. But how do I go about cleaning the cap? Thanks for all the help.