Our Jotul Oslo on its 2nd winter of 24/7 heating has recently developed some minor air leaking. Done: 1. Gaskets replaced last fall: there is some dollar bill barely slipping in small sections of the side door and the ash pan. I will re-gasket them during our next warm-up just to be sure. 2. The clear ceramic "glass" on the front door was out of place; tightened the brackets and repositioned the ceramic plate. The gaskets between the ceramic and door look OK. 3. Smoke from a "punk stick" does not get pulled into the stove anywhere except into the air intake in the lower rear. 4. The "dog box" air control operates perfectly. It was opened and checked. 5. Light inside the stove shows no leaks--dark room method. 6. Mystery- the ash pan door has a shiny creosote coating, yet closes perfectly. 7. I have not tightened the bolts inside the Oslo yet, or lit a smoke pellet in the stove with the flue closed off. I'm looking for more ideas and techniques for finding air leaks from the experienced and/or dealers for checking those tricky air leaks on wood stoves. Not necessarily from Jotul owners. THX.