I bought a nice used Resolute III stove and this is my first winter using it. I have tried on two occasions to burn it with the damper closed in what I think VC calls cross burn. I have been unable to keep the temp up. Prior to trying it with the damper closed the griddle temp was around 500 and the pipe temp was 250. I have a masonry chimney. Is it hopeless to try cross burn unless I have a chimney liner? Is there a better chance for success once it gets much colder outside - 20s and 30s?