Trust Johnston’s Chimney Sweep Inc for professional chimney cleaning in Washington, PA. Chimney cleaning is crucial in keeping your home or business safe. Soot, creosote, pests, and other debris can clog up the flue, making it difficult for smoke to get through. This buildup does not only pose a fire hazard but can also break down the lining and structure of the chimney. In order to avoid this from happening, chimney owners must be sure to have an annual cleaning.