i have an old canteen of Viceroy cutlery [[http://www.ebay.co.uk/itm/Vintage-18-Piece-VICEROY-Sheffield-Stainless-Steel-Cutlery-Set-702-H42-/381236310647?pt=LH_DefaultDomain_3&hash=item58c3747277 like this.]] Can anyone tell me the best/easiest way to clean it?