Cleaning your chimney is an important step in removing dust, dirt and odors from your home. A chimney sweep is a professional who can effectively clean your chimney flues to prevent buildup and blockage. If you have a wood-burning fire place, you should clean your chimney after every cord of wood is burned, while oil and gas chimneys should be cleaned and inspected annually. A chimney sweep will prepare your home using protective tarps so that soot does not enter your living space. They clean your chimney from top to bottom, beginning on the roof by removing debris and finishing in the basement where they will disconnect the flue from the furnace where appropriate.