Soot on vented gas logs is nothing to worry about. It is a natural occurrence when the yellowish flames of a gas log impinge on a rough surface. Some people like the look, some don’t. If you don’t, we suggest that you VERY CAREFULLY take the logs outside and brush the soot off with a whisk broom. Be very careful with the logs – you may want to put them in a box, because the soot can easily come off and it will leave a very nasty stain on carpet. Some people just brush the soot off the logs while they are still in the fireplace; however, this can leave messy globs of soot on your embers. There are soot cleaners available that you just spray on the logs, but over time, this can lead to bleaching, which will make your logs less realistic looking. NOTE: If you have vent – free logs, you should not have ANY soot on them (or inside the fireplace itself) – if you do, then the logs are not burning properly. In such a case, shut them off and have a qualified technician check them out.