Dometic RM2510, flue/burner stack insulation?

I opened the sheet metal burner stack up to get at my AC/DC heating elements and found a bunch of straw like debri stuck in the insulation. I pulled a lot of it out, but now looking at if I should just pull it all out and replace it or if it’s good enough to leave it as is and run it. I’m leaning towards the former.

Looking for some other opinions, but if I decide to replace it, what should I go with as a replacement?

Also, I have a few leads disconnected, I was hoping to see a few pics of the correct wiring.

Thanks guys!