The first rule of coin collecting is: DO NOT CLEAN YOUR COINS. This is the most important piece of advice for any collector, new or old. Serious collectors and experts agree that most coins should ...

Here's what to do—and not do—when cleaning collected coins. Chalk it up to the excitement of having my own money for the first time, but when I was a kid, I loved cleaning all of the coins collected ...

If I stumble on an old coin or bill in a drawer, my first instinct might be to clean it up or rush to sell it, but those snap ...