We have had the Vigilant since we moved to the house 9 years ago. We didn't really burn alot of fires because we had small children running around and our stove is out in the open. Now that the kids are grown up we have been using the stove more often (life saver when Sandy hit). Aside from vacuming out everything and inspecting chimney, we really didn't do any maintenance. This past weekend, we lit a fire and once the the fire started to die out we had smoke come into the house, to the point were we had to open all the windows. I have been checking all over the internet to what could have caused this to happen. From negative air pressure to gaskets. After inspecting the gaskets, I decided to replace them and its is fairly easy, but I have a few questions. Should I replace the gasket on the flue collar? I do have a gasket for it but the screw wont budge. I have thought of using WD-40 or the likes to losen it, but I am unsure if I could do that. There is also the gaskets around the windows and those screws won't budge either. Any suggestions? Thanks in advance!