I just wanted to say that the nests you see might just be the tip of the iceberg. I saw nests under the pillar of one of my machines. I took an ice pick to it. Worked a long time. pulled off the inspection late at the top of the pillar and I couldn't see any machine parts, just dried mud. Taking the faceplate off gave me the same view. I haven't resorted to soaking yet, but I am about ready to give it a bath in used motor oil since I have some kicking around. I can finally get rotating parts moving, but not with any free spinning. I used the ice pick, a long skinny screwdriver and a punch. Chop sticks would have just splintered in my challenge. best wishes.