CRYSTAL CLEAR IS A GREAT OPTION TO CLEAN CRYSTAL JEWELRY AND GLASS. THE FORMULA ALSO WORKS ON SMART PHONES, SMART WATCHES, AND TABLET SCREENS. THE 2.5 OZ SIZE COMES IN A PUMP SO IT IS EASY TO TAKE WITH YOU IF NEEDED. JUST APPLY A SMALL AMOUNT ON A DRY CLOTH AND WIPE, NO RINSINH NEEDED. IT IS THAT EASY.