Cleans where others fail

For this Scheibenreiniger there are quite a few negative reviews, but where I start from different expected properties. In short words: it is not easy to carry out the daily cleaning of a chimney plate, but was designed to remove stubborn deposits.
Meet in the normal dirt - like any fireplace owners probably know - the completely standard household tricks like ashes on an old rag. But it happened to me once, that resinous wood so unfavorable leaned against the window that many close together lying black small (unfortunately very showy) were points over the entire disc. I have in mind for hours with window cleaner, ash and coffee grounds (another tip) scrubbed - to no avail. Before hard device I shied away because of the disc. This chimney cleaners but made it easy, and without scratching the disc. This rather one needs perseverance as skill or strength. An hour gentle circling, and the 40cm * 60cm disc was not as clean as many years. And I had already thought of a new disk to buy ... Great stuff!