Clean Sweep Chimney Service is owned and operated by local firemen; so I had extremely high expectations, and they were validated from the moment the workman entered the doorway. Not only was he genuinely courteous, but he patiently and thoroughly explained to me the nature and dangers of creosote build-up and then went on to carefully explain what he would do to clean the chimney and remove the creosote. He first covered the fireplace with a canvas type of material, so no dirt would get into the house (my wife really appreciated that!), and then he worked quickly and carefully doing the actual cleaning. The design of the damper is somewhat awkward, but he figured out an alternative way to clean that area. Working from both the fireplace and the top of the chimney, he also examined the structure of fireplace and chimney, reported to me some problems, and described to me a range of possible solutions for each problem. I had also asked that he clean out lint build-up from the laundry dryer exhaust tube ? another potential fire hazzard. He did that quickly and neatly as well, and he declined to charge me for that because, he explained, the exhaust tube was easy to access, short, and only took a short moment to clean.