Hey all, current chimney is clay lined 6x10.5 ID. I know, I know, I need to get a liner but I cant right now. What size chimney brush should a use for this? Lowes and Tractor Supply have an 8x8 square and 6" Round. Im sure I could order a 6x10 online but I need to get this swept asap. What size would be best out of the two above? Would the 8x8 even fit? My concern with the 6" round is that I wont be able to get into the corners very well.