Hello, remember that First of all, the danger of an uncleaned chimney lies in the possible ignition of soot and the occurrence of a fire, as well as carbon monoxide poisoning. In addition, with a large accumulation of soot on the walls of the chimney, the efficiency of the stove or fireplace decreases. Therefore, regular cleaning of the chimney is extremely important. which is why I regularly use chimney cleaning Brooklyn and order from their website https://www.bestcleaning4u.com/