i bought 2 of the Gold MB's about half a year ago, one for the memories and for playing. Actually it seems the played one loses its gold clour on the cover a little when you clean the covers, because of handsweat and dark spots . it becomes more and more like the usual MB ... so, don't clean it with strong cleaner at all, i would say. not to mention the swelling comb when you are long time and full time gold MB-player , but that's well known an normal.