I have the same stove for about four years, and the glass has always been sooted within about 48 hours. I never adjusted the draft blower as the stove delivers great heat! For what it´s worth, I´ve only cleaned it once and replaced one snap switch myself. I believe the igniter just went, but I haven´t replaced it yet, so I don´t know whether that´s really my problem. I´ll report back once I´m through with that process.