Just in case anyone else runs into this problem, here is how I got the big clump of melted insulation off the exterior of this machine. I used Gojo original formula hand cleaner. The Gojo removed the thick rivers of dried grease in just a couple of applications, the insulation took a bit more persistence, but it did a great job. This is the first time I've used Gojo, this stuff is amazing!
Here are a couple of pictures so you see the problem and the results.
Before:
After:
