If you take a look at the picture, I have pellets that end up on the lip (I don't know what to call it) outside where the heat comes out. When I first bought the stove this never happened. As the years have gone on it's getting worse and worse and more and more pellets end up on that lip. Is this something I should be worried about, I'm just curious if this is a sign of something being wrong with the stove or if it just happens. It's curious that over the last few years this has started to happen.