I was talking to someone about working on the Suburban and I mentioned that when I had the magneto off cleaning the contacts, the wire came out. I told them that I pushed it back in but was afraid it would come out some day as it felt a little loose. They said you need to turn it into the hole because the contact is like a screw and that's what holds it in. They sugested a replacement and said I need to get a solid core wire, not a carbon core. I found a new wire to replace it. My question is, "what's a good way to clean that little contact inside the hole before I put the new wire in?"