help cleaning chimney liner

[joann]

I was hoping someone could help me out. I have a jotul 450 insert with a 6 inch stainless rigdid liner. I am planning on sweeping the chimney out sunday and have a few questions. I will be using a poly brush and was wondering when i push the brush down the liner, do i go all the way into the stove. I thought that this might loosen up the cement that was used to make the stove to pipe connection. i was also wondering how hard it will be to pass the brush through the offset where the pipe is ovalized. i had the sweep out in the beginning of the season, and beleive i can do this cleaning myself. the hardest part is going to be dropping the baffle, and getting it to go back up correctly. thank you