Wash coins with cool or lukewarm water to remove loose dirt
Use mild dish soap and your fingertips to gently clean both sides
Rinse thoroughly with clean water
Pat dry with a soft, lint-free cloth
For stubborn grime, soak coins in distilled water and change the water if it becomes dirty
For light oxidation on some coins, use a gentle soak in isopropyl alcohol, then rinse with distilled water and dry
For heavy tarnish, use a coin-cleaning product made for coins and follow the label directions exactly
For dirt in crevices, use a soft, non-metal brush (e.g., a clean makeup brush) under running water
Handle coins by the edges only
Dry immediately after rinsing to reduce spotting
Avoid abrasive cleaners, scouring pads, and toothpaste
Avoid metal brushes, scraping, and polishing compounds
Avoid bleach, vinegar, and other household acids
Avoid ultrasonic cleaners unless specifically recommended for your coin type
Avoid heat drying (hair dryers, ovens) to prevent spotting and damage
Avoid soaking valuable/rare coins in unknown chemicals
Stop if the coin’s surface becomes dull, scratched, or discolored unexpectedly