Things You'll Need
Instructions
Method 1
Fill a small container halfway full of water and add five to six drops of mild liquid soap. Agitate the water with your fingers to form bubbles.
Place the quarters into the mixture and allow to soak overnight.
Remove the coins from the water. Rinse under running water and dry with a cotton cloth.
Method 2
Pour 1/2 to 1 c. of olive oil into a small container.
Soak the quarters in the oil overnight. Remove each coin and gently pick away remaining dirt with the end of a toothpick.
Rinse each quarter under running water and dry with a cotton cloth.