An Ounce of Prevention:

After each wear, gently wipe down with clean dry microfiber or sunshine polishing cloth and store in clean, cool, dry place.

Oxides and tarnish will eventually form on the surface of silver and even gold after exposure to the oils in our skin. This is accelerated by moisture and warm air.

You can help prevent this by waiting to put on your jewelry with clean dry hands, after you have applied any product to your hair or completed your makeup.

A Pound Of Cure:

If it can not be avoided, hot water and mild dish soap can be used along with a very gentle scrub with a soft bristle tooth brush.

A sonic cleaner with a mild detergent may also be used, but I recommend against either method if at all possible.

While the background ink is robust against normal wear, these cleaning methods could remove the ink used to darken the background more quickly, and your jewelry will require repair.

In either case, pat the piece dry thoroughly with a microfiber or sunshine polishing cloth before storing it away.

Never:

Never use abrasives or abrading compounds to clean jewelry.

These include steel wool, scotch brite pads, nevr-dull, and many common polishing solutions.  These are all great products with wonderful uses but the abrasive nature will blur and/or remove fine engraving. 

For particularly aggressive cleaning, which is sometimes required for particularly neglected sterling silver, I suggest Wright’s silver cream.