How do you know if you need a chimney sweep?

6 Indications You Should Call or Contact a Chimney Sweep

1.  Fires are burning poorly in your fireplace. …
2.  You have a strong  unpleasant odor coming from a fireplace or chimney. …
3.  You notice greasy looking black soot or creosote. …
4.  You have a buildup of smoke when burning wood for your fire. …
5.  The damper in the chimney is in poor condition. ….
6.  You hear the sounds of animals or birds inside your living area…