have any of you ever had any critters gointo your chimneys? over the summer we had a squirrel go all the way into our fireplace...so we made a long rope and he eventually climbed out. after that we made sure the damper was closed tightly. now it sounds like something is in the chimney right on top of the damper. probably another squirrel. i never knew chimneys were this much trouble even when you dont use them.