A mini-brush for use in cleaning and clearing obstacles from within a carryover tube in a furnace. The brush having a handle coupled to a first end of a flexible shaft, a guide point coupled to a second end of the flexible shaft, and a plurality of bristles coupled along a length of the flexible shaft, the plurality of bristles having a first side located adjacent to the guide point and extending along the flexible shaft towards the handle. The flexible shaft is a stranded cable wire permitting the guide point and the bristles to navigate a 90 degree corner through a tube