How to Clean a Diamond Ring. If you're diamond ring isn't as sparkling and shiny as it could be, clean it up a bit. Here's how.
Close the drain in the sink.
Soak the ring in a sink filled with hot water.
Fill a small dish - such as a contact lens dish - with window cleaner.
Transfer the ring from the hot water to the dish containing the window cleaner.
Let the ring soak for at least 10 minutes.
Dip an old toothbrush in window cleaner and scrub ring thoroughly for several minutes.
Refill the sink with hot water and soak the ring for a few minutes longer.
Continue scrubbing with the toothbrush, now under a flow of hot water.
Rinse well under hot water.
Repeat, if necessary, until you achieve a brilliant shine.