Try washing your hands with ivory or dawn dish soap before you touch the gold plating next shave, if it doesn't come off it could be the oils in your skin. Some people can tarnish gold, silver, nickel, and nickel silver by just touching it and letting the oils from their skin dry onto the metal (me being one of them). If it's still doing it during the shave (be sure to check after your first and second passes), then the electro plating at the plant may not have taken correctly for numerous reasons, one being if that part of the blade was touched bare handed before going into the chemical bath...biiiiiig no no!