Copper bracelets for arthritis

[AprilBaby]

I have moderate arthritis in one foot and the other knee. I get shots for the knee and I am going to have a complete replacement in feb. I have been reading a little about copper bracelets to relieve pain. I decided since I am very acidic and it would turn green on me to try a copper ankle bracelet rather than a wrist cuff. I found a cool site and ordered one and its probably my imagination or mind over matter but I really do feel better! Anyone have any experience with copper relief??? Also, does the copper turn green on the surface and just need to be cleaned or is it deeper and needs more attention?