As Greg said, I'd leave it alone at this point unless one of the two following things is bad.....
One is to check if the baffle plate is flaking away. On a unit I owned, probably from moisture & ash residue over the summer, the plate was peeling away in layers and ended up extremely thin in sections.
The second is the integrity where the baffle plate welds to the side of the stove. On my unit, the baffle plate warped badly (thinner plate + too hot fire) and the welds were stronger than the sides which developed cracks as the plate pulled them in from warping.
Toward the end of the last year I burned it, exhaust escaped from these cracks. It took me a while to find it. I thought the exhaust smell was due to poor draft from ash build up or coming from the flue pipe seams and joints as it exited the stove and thimble and I kept "fixing" that. It wasn't so bad that the CO detector went off or changed its numerical reading, but I kept getting a slight smell of exhaust.
I am making sure that I vacuum off the baffle plate as well as I can at the end of the season and during the mid-season warm spell fly ash cleanings. On mine the fly ash collects there as well as the thimble and you will see a drop in draft when it builds up. You can get access to the top of the plate from the front opening and also through the exhaust port in the back. It does take a bit of twisting to get the vacuum hose in there.

