Apple’s physical, titanium Apple Card is one cool looking credit card thanks to its laser etching of the user’s name and the Apple logo. However, the coating can be marred if it comes into contact with hard surfaces or materials.
If that happens, here’s how Apple recommends you clean the titanium card:
° Gently wipe with a soft, slightly damp, lint-free microfiber cloth.
° Moisten a soft, microfiber cloth with isopropyl alcohol and gently wipe the card.
But don’t use window or household cleaners, compressed air, aerosol sprays, solvents, ammonia, or abrasives. Apple says that some fabrics, like leather and denim, might cause permanent discoloration that won’t wash off.