I've been get these odd balls of what looks like soot appearing on my gas f ire grills. I've taken the grills out and hoovered it out, plus I got a sma ll hose attachment which I pushed out the small vent holes just above the g rills. But I didn't get a load of soot like I was expecting. I'm wondering if it's something to do with the way the gas it's self is burning that is c reating this balls. They basically burn themselves out when you turn the fi re off but it's obviously still a problem.
Any help would be great!