For the second time now I've forgotten that my mouthpiece and reed are set up on my horn and left for a couple hours to return to a reed with some green discolouring. It's a newly refaced brass link so I'm thinking rather than it being mold it may be coming from Copper Oxide (the like that often builds in the neck and horn) in the reed fibers. It's notable that there's a dark grain in the brass where its happening. (I'm assuming those darker grains are places that weren't really touched in re-flattening the table.) Anybody have any experience in the matter? Throwing away otherwise perfectly good reeds makes me angry. :mrgreen: Thank you!