I'm cleaning my Tiffany DBTY earrings as we speak.
I use the dish soap & water method... I combine a bit of liquid dish soap and water in a little metal bowl with my jewelry, and then heat it until nearly boiling. I allow it to cool and then use a soft toothbrush to clean my jewelry. Then, I rinse, rinse, rinse and finish with a shot of Windex to make the diamonds sparkle.
I use the dish soap & water method... I combine a bit of liquid dish soap and water in a little metal bowl with my jewelry, and then heat it until nearly boiling. I allow it to cool and then use a soft toothbrush to clean my jewelry. Then, I rinse, rinse, rinse and finish with a shot of Windex to make the diamonds sparkle.