Been using the ash method and it works well but I thought I heard that certain cleaners contain additives (silicone?) that conditions the glass so dirt does not stick as easily. Anyone know if this is true? I'd like to pick something up since I figure sooner or later I'm going to dab the ash and pick up some sand. BTW there has been some talk about not using glass plus on the glass/ceramic so I stopped using it. I was at a stove shop the other day and the product they carried contained ammonia like glass plus cleaner.