I have literally never cleaned my jewelry before so when I got this, I didn't know if it would make a dent or not as a lot of it was so tarnished I didn't wear it anymore. It got EVERYTHING super shiny and took off spots I thought must be unremovable now. I wasn't expecting that so it exceeded my expectations a lot. The pieces that were really bad took some time to clean completely, the longest was about 20 minutes for one big silver band, but the rest about a minute or two each. You just rub it in the cloth the black comes off and your silver looks great. I have a bunch of stuff I can wear again, wish I'd gotten one of these years ago.