I have a Woostock Fireview stove which I absolutely cherish. This is the third season I've had my stainless insulated liner installed in my chimney. All of a sudden, it seems like I can't start a fire without smoke coming out the door, or if I feed the stove and have the door open just to get it going I get smoke in the house now. Strange. It seems to have started a week or so ago when it was warmer out, which would also be normal for my setup. This am it's 22 degrees out and the symptom is there...really annoying. I unhooked the stove from the pipe, removed it and used a soot eater to clean out the connecting pipe and the pipe in the wall all the way to the chimney liner which then turns and goes up. I got a little crud out of there but it wasn't too bad. Could there really be an obstruction uo there causing this? The top of the pipe has a cap with screen mesh so I doubt a squirrel or bird got in there. I'm leaning toward calling and having a chimney inspection done, just had it done a year ago but something seems to have changed with my draft. Has anyone experienced something similar?