Green "Crud" on my Slings?

[usabaker]

As noted, cleaning verdigris out of brass sling components prevents mechanical expansion and damage. In a similar manner to rust expanding 9 times it's 'eaten' volume, which causes an enormous pressure on surrounding components and leads to mechanical failure.

I have had much success using Palette Knives aka Painting Knifes to get under the brass on slings to clean them out. I've used dental floss as well on snaps and such, but it tends to brake easy.