Keep flammable items away from your fireplace. Using chemicals to start a fire can quickly increase the size of flames and trigger overheating. Only use a match and wood to start a fire.
Build a small fire. Large fires can trigger fireplace overheating. Rather than stack the fireplace with several logs, start with one or two logs and then add more as needed.
Keep the glass door opened at least a crack to allow air to reach your fireplace. This keeps the fire manageable and reduces the risk of overheating. Open your fireplace damper to increase air flow and ventilation.
Position a spray bottle near your fireplace. Give the fire a few sprays to reduce large flames and lower the temperature inside the fireplace to prevent overheating.