ive never been on a forum before. not sure what im doing yet. forgive me. lets give it a try. i just finished my install of my northstar zc fireplace. after the first four fires... each one alittle larger than the previous one. breaking it in. im noticing two small dark soot circles on each door at the top. i read on this site someone had the same problem saying they thought the two rivets holding the faceplate on maybe was blocking a tiny bit of the air wash over the glass...? does anyone remember reading that? or maybe had the same problem?