I second this sentiment - i blew out my cat with some air, and it is a whole new cat. Definitely noticed a difference in performance immediately, specifically less smoke out the chimney. Worth doin for sure.I have the same stove model. Roughly the same amount of years on it. This may be the fifth. Very similar months of 24/7 burning each year. I bought a replacement cat through my dealer this fall after feeling that the original was off in performance. While I waited for it to arrive I let the stove go completely out. Cleaned her out nicely including my pipe. While I was at it I vac'd the face and the rear of the original cat carefully (normal procedure while cleaning my pipe/stove). On a whim I went to town and grabbed a can of compressed air for cleaning electronics etc. Blew out the cat from the front as I had re installed my pipe by then. Figured I had a new cat en route. Why not. Huge cat performance difference. . My new cat is sitting in it's package on a shelf. True story.
If you have not adjusted your door tension I would. Mine had gotten very loose.