How to Clean a Penny

Introduction

Pennies naturally darken and tarnish over time due to oxidation and exposure to oils, dirt, and moisture. Cleaning them can restore shine for display purposes, crafting, or curiosity—but it must be done carefully to avoid damaging the coin.

What You'll Need

• Mild dish soap

• Distilled white vinegar

• Table salt

• Soft toothbrush

• Microfiber cloth

Steps

Mix a small bowl of white vinegar and salt until the salt dissolves.
Place the penny in the solution and let it sit for 5–10 minutes.
Remove the penny and gently scrub with a soft toothbrush if needed to lift stubborn spots.
Rinse thoroughly under warm water to remove all residue.
Dry the penny completely with a microfiber cloth to prevent new tarnish.

Alternative Methods

• Use lemon juice and salt for a natural cleaning solution.

• Rub the penny gently with a baking-soda paste to lift oxidation.

• Use an ultrasonic cleaner for nonvaluable coins.

What NOT to Do

• Do not clean rare or collectible coins—cleaning may greatly reduce their value.

• Do not use abrasive pads or tools that can scratch the metal.

• Do not soak coins for long periods, which may cause discoloration.

FAQs

Does cleaning a penny reduce its value?

Yes. If a penny is rare or collectible, cleaning can significantly lower its value. Only clean coins with no numismatic value.

Why does vinegar clean pennies so well?

Vinegar contains acetic acid, which reacts with copper oxide (the tarnish), dissolving it and revealing the shiny copper beneath.

Is it safe to use ketchup to clean pennies?

Yes—ketchup contains mild acids that remove tarnish. It works, but it’s slower than vinegar or lemon juice.

This article is for informational purposes only. Always follow manufacturer instructions and use proper safety precautions. You assume all risk for any actions you take based on this guide.

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