It shows that it does some cleansing, but don't expect miracles from all these products because the most correct and effective thing is the cleaning of the chimney by a professional or by you if your hands are skilled!

I only burn pine in the fireplace. Always with great care. Pine has resin, it leaves deposits in the chimney and produces a high flame. If these catch fire, we're in trouble. This powder in the packet neutralizes all those stuck particles and prevents them from igniting and burning the chimney. They also come off easily during cleaning with the brush, and if the fireplace pulls a lot, it will blow them out in the coming days. Don't expect to see the fireplace looking like you've brushed it. At least in the flue. In the second half of the chimney, there are no dirt particles; they must have been removed during the burning of the powder. I burn 6 cubic meters of pine a year, and it's a three-story single-family house