Handle coins by the edges only
Rinse gently with distilled water
Soak in distilled water to loosen dirt
Gently swish in water without rubbing
Use a soft cotton swab for loose grime
Pat dry with a soft lint-free cloth
Air-dry completely on a clean surface
Repeat with fresh distilled water if needed
Avoid scrubbing with abrasive materials
Avoid metal brushes or rough cloths
Avoid vinegar, bleach, or harsh chemicals
Avoid polishing or abrasive cleaners
Avoid cleaning rare or collectible coins
Store cleaned coins in dry, inert holders