I was recently using an allen wrench to clear the holes in the burn pot of my XXV. I noticed that what I believe to be the rear most holes, seem to have something blocking them. I can get through the initial steel surface, but then the wrench seems to hit something. It is only in the center four holes. The outer ones seem to be fine. I was unsure if they are in fact blocked by build up, or there is something underneath them. My only guess is the the igniter. But since I have never done any service on the unit, I don't knew exactly where under the burn pot the igniter sits. If they are blocked, I would obviously like to clear them. But I certainly don't want to be poking the igniter, if that is what is in my way.