So I am a risk taker, don't flame me. We have had our house of 14 years and never have the chimney swept. I have held off doing it because I am have a plan to put a new ZC woodstove and new chimney in. Last night I put a piece of wood on that was disguised. It was saturated with pitch and didn't know it. Fire flared up big time, and so I immediately went out side to check the chimney. Chimney was red hot and flames were shooting out about 1.5 feet!! I just about chit my pants ran inside and yelled, "We need to get this log out of the fireplace know, we have a chimney fire!". Grabbed the tongs and told my wife to stamp anything out that falls on the carpet as I carried this inferno log outside. Fortunately it was only about 15 feet, and not much damage occurred. How much should it cost me to have a chimney sweep? If I just get some of those chimney clean logs will those work for a while? I know that my root cause is two things: 1) Burning not completely dry wood. 2) Not doing a yearly sweep. I will be doing chimney sweeps yearly with the new install. Wish I would have taken the time to take a picture ).