I have had my grill for a bit over a year and love it. However, the top vent has become stuck with black soot every time I try to start a fire and I have to use a hammer to open it. Anybody got any tricks to cleaning this stuff, as it is down in a hole basically, its difficult. I already tried wiping it with paper towels. I have also bought a cover a few months ago that prevents rain from getting on it now, which keeps water out of the thermometer. The first time it rained the thermometer got filled with water and the warranty people told me to ignore it cause the grill still works... My only real complaint so far other than the fact that there are no temp control fans that fit this thing... Thx for any help.