So, we removed the muffler screen, covered the hole, and took it out to clean it.
Ray then de-congested the muffler by burning off the crud clogging it up with a propane torch.
Stihl was a bit worried about his buddy. So he came out to see what we were doing to make her feel better. Safety applies to everyone, so Sally made him his own personal safety glasses.
Then we put everything back together:
Here's Stihl and the clearing saw - all better and ready to get back to work!