Cob

The chimney sweep's apprentice learned how to use the cob to clean the chimney.

He bought a cob at the hardware store to clean his own chimney.

She watched in amazement as the cob navigated its way up the narrow chimney.

The cob was covered in black soot after it was used to clean the chimney.

The chimney sweep demonstrated how to use the cob to clean the chimney.

I saw a cob lying on the ground outside the house.