Ron,
I was just about to post what Kermit recommended, Clean UP which is a mild solution of bleach and water. Great minds think alike.
Your idea of the bleach soaked,rolled up, paper towels stuffed in that tight area above the windshield is a good one. I also wanted to protect that area once we got it clean. We'll use our Turtle Wax Scratch remover as you suggested.
As I mentioned to Kermit, I didn't want to use any product that would damage the painted areas around the seams. Apparently diluted bleach should be fine.
We can't get to it today but will post the outcome.
Gail
Gail