Most berries, while delicious, can leave your hands stained. Some lemon juice, either on its own or combined with other things, will help return your hands back to normal without the need for any hardcore cleaning products.
Photo by Andrea Parrish - Geyer
If you go berry picking, do any cooking or baking with berries, or just like to snack on them, your hands and fingernails will get stained. You can wear gloves, but then you also lose some dexterity and feeling.
Mrs. Clean at House Cleaning Central suggests using the juice of a fresh lemon. Cut a lemon in half, make a few slits in each segment, then stick your fingertips in there to soak a little. Add a sprinkle of salt on to your hands afterward -- for the abrasiveness -- and then wash them normally.
As an alternative, Mavis at gardening blog One Hundred Dollars a Month suggests ixing the lemon juice with some cornmealto form an abrasive paste to rub all over your hands. This works with all kinds of berries so you'll never get caught red-handed. If the stains got anything else, however, you'll need to find a different approach
How to remove blackberry stains? [Mrs. Clean]