One common sign that your fireplace needs cleaning is when it smells like a campfire. This is usually due to a build-up of soot and ash in the fireplace. Another sign is when fires burn oddly. This can be due to a blockage in the fireplace, which prevents the fire from getting enough oxygen. Additionally, it may take more effort to get a fire going and keep it going. This is because the build-up of soot and ash makes it difficult for the fire to ignite. If smoke starts filling the room, this is also a sign that the fireplace needs to be cleaned. This happens when the air can’t circulate properly, and the smoke gets trapped in the room. The fireplace damper being black is another tell-tale sign that it’s time to clean the fireplace. Lastly, if there are oily marks on the fireplace walls, this is also a sign that soot and ash have built up on the surfaces. If you notice any of these signs, it’s important to clean your fireplace as soon as possible.