I understand that the GOLD Hardware on the Hermes Birkins and Kelly is plated(?). Did anyone have a problem with the hardware tarnishing? I'm a bit concerned because the GH zipper of my Birkin looks tarnished even though it is brand new... Everything else outside looks perfect....Why is this so? I never had this problem with my Palladium Hardware one...Is this a defect? Anything I can do to get rid of it?