That said, if, the coin is heavily tarnished or has an unusual substance stuck to it. In that case, it is essential to handle it with care. Here are a few steps you can consider, though it's best to consult with a numismatic expert or a professional coin restorer before attempting any cleaning:
1. Gather the necessary materials:
- Soft cotton cloth (such as a microfiber cloth)
- Distilled water
- Mild dishwashing liquid (e.g., Dawn or Joy)
- Two small containers
2. Prepare your cleaning solution:
- Mix a tiny drop of mild dishwashing liquid with approximately 1 cup of distilled water in a small container. Make sure the mixture is diluted and has minimal soap.
3. Gently wipe the coin:
- Wet the soft cotton cloth with a small amount of cleaning solution.
- Gently wipe the surface of the coin in the same direction, avoiding circular motion.
- Apply light pressure; the goal is to remove dirt and residue without scrubbing.
4. Rinse the coin:
- After wiping, rinse the coin thoroughly under gentle stream of distilled water.
- Make sure to rinse all soap residue.
5. Pat the coin dry:
- Use a soft, dry portion of the cotton cloth to carefully pat the coin dry.
- Be gentle to avoid any scratches.
6. Let it air dry completely:
- Place the coin on a soft surface in a location with good air circulation.
- Allow it to dry thoroughly before storing it.
7. Refrain from using harsh chemicals:
- Avoid using abrasive cleaners, toothbrushes, or harsh chemicals, which can damage the surface of the coin.
Remember, cleaning old coins can be tricky and irreversible, so it's essential to consult with an expert if you have any doubts or hesitation about cleaning process.