Check out my colleague's review of the Diamond Dazzle Stik to get more deets.
Promising review: "I used to drop my rings in a bit of watered down Windex, let them soak, then scrub with a soft toothbrush, rinse, and dry. That process took about 15 minutes, and even then my rings, and particularly the stones, were not flawless looking afterwards. I thought it did the job. ENTER DIAMOND DAZZLE STICK! I bought this after reading a BuzzFeed list and now I literally I sound like an infomercial talking about this thing. It’s incredible. First you dispense a little product, and you don’t even have to take your ring off!!! Then you scrub for approximately three seconds, rinse, and BAM!!!! Holy sparkles, Batman. My precious stones have never looked better. Even rings that looked pretty good before, I couldn’t believe how sparkly they were after this. Consider me a lifetime customer." —Amazon Customer
Get it from Amazon for $6.99.