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Never clean old coins, pennies, nickels, dimes, etc... Coin collectors want the natural patina. If the pennies have dirt on them then soak them in water to remove the dirt.

But don't use any detergents. Detergents can damage the surface of the coin and leave pitting lowering the value of the coin. Also do not rub the coins together to loosen the dirt, this can scratch and wear the coins and lower the value.

Coins (US Coins) will be worth face value to a non-coin collector, but if you plan to collect coins or just clean them to sell as collector pieces, then don't clean them.

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13y ago

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