Yes, sometimes to get to the bottom of the glazed creosote requires help and that is where a professional grade creosote remover comes in.  Thankfully not something that is necessary a lot but when it is.. it is.

Going to be a cool night – a few wood fires burning out there already I expect.  Be sure to stay safe – burn good seasoned wood and have your chimney swept by Certified Chimney Sweep on regular basis.