I am still having a lot of trouble cold starting my Jotul Oslo. For about the 10th time this year, I had smoke billowing out the bottom and sides when I tried to cold start this morning. I checked the chimney and the cap and everything is perfectly clear. It was 18 degrees and no wind. I just can't figure this out. I even ran a heater in the firebox for 10 minutes to start the draft first. I am starting to think maybe my chimney is too short. I have 15 total feet of Excel 6 inch, with two 15 degree angles. The exit from the stove is straight out the back then an immediate T to vertical. The cap is a little over 2 feet above the ridge of a one story ranch. Do you guys think I should add another 2 feet? I don't really want to spend 130 bucks if I don't have to, but I will if it will solve this problem. Filling the living room with tons of smoke is getting ridiculous. Thanks.