I have had a Lopi Leyden wood stove for 10 years. Fantastic until about a year ago and would not vent properly. Draft is fine (chimney cleaned, cap clear, draws hard when damper open). When in operating mode I have to keep the air vent mostly open to burn. This is a new feature... I always could run it on 2nd or 3rd line out and it would run hot. I replaced the combustor last year, and again it was good for 3 months. Now I am back to the same problem. I have l cleaned out the back, bedside the combustor and vacuumed the combustor to the extent I can. I did not pull the combustor. Anyone try to blow out the combustor or vent passage? Is there a way to access the air flow under the stove? Pull the combustor?