Are the D'Addario Chromes supposed to make my fingers and fingerboard all greyish? They don't do it anymore because I've used them enough and wiped it all off, but for the first couple of days they did. As soon as I opened the package my hands were all covered in grey. It was mainly from the E and A string. They also gave this weird powdery grey stuff off to the fingerboard of my fretless. It easy to wipe it off on my hands and off of the board but I had to do it often until it was all gone. Has anyone had this happen with their Chromes? Do Chromes actually have chrome on them? What are they made out of?