I have an older St. Croix Hastings stove that over the years has been super reliable. Over the past few years, I've found that the stove glass gets dirty much quicker than it used to. I've done a deep clean, leave blower trick etc,. I started messing with the air intake damper and that seems to help with the glass staying cleaner a bit longer, but not much. I've noticed it stays cleaner and doesn't ash up as black with the damper closed more (less than a pencil width). The downside with that is that I've noticed the burn pot fills with clumped ash, thus the stove doesn't light after too much is in there. This is a new symptom since I've been messing with the air damper. I'm not sure what else to do at this point. Does less air mean the ash will clump more?