Yes, chimneys should ideally be swept every year, even if they are not used frequently. Annual sweeping removes soot, creosote, and debris that can build up and create fire hazards or block airflow. Creosote is highly flammable and is one of the leading causes of chimney fires. Even gas chimneys can develop blockages from dust, animal nests, or structural deterioration. Regular sweeping also improves efficiency, allowing smoke and harmful gases to exit the home properly. Annual maintenance gives professionals the opportunity to inspect for cracks, leaks, or liner damage. Addressing these issues early can prevent costly repairs later. Insurance companies and safety organizations often recommend yearly chimney cleaning as part of responsible home maintenance. If you use your fireplace heavily, more frequent sweeping may be needed. Keeping up with annual cleaning ensures safety, improves performance, and extends the lifespan of your chimney system.