Why plating changes the cleaning rule
A 925 silver piece is 92.5 percent silver and 7.5 percent other metals, usually copper. On its own it is soft enough to mark with a polishing cloth that is too aggressive.
Rhodium or gold plating adds a harder surface layer. That layer is thin, measured in microns, and it is what gives the piece its colour and much of its tarnish resistance. An abrasive removes plating before it removes tarnish, and once the plating is gone the colour change cannot be polished back.
That is why a care card should never say polish with silver polish without qualification. On plated stock the default is a soft cloth and mild soap, not a paste.
The daily routine that prevents most problems
Wipe the piece with a dry microfiber cloth after wear. Skin oils, hand cream and perfume sit on the surface and hold moisture against the plating; a short wipe removes most of them.
Put jewelry on last and take it off first. Perfume, hairspray and sunscreen are the usual cause of cloudy plating, and chlorine from pools or hot tubs attacks silver alloys directly.
Remove rings and bracelets before cleaning, gardening or gym work. Abrasion is cumulative, and the scratches that dull a polished finish come from daily contact far more often than from cleaning.
Deep cleaning without abrasives
Mix a few drops of mild, pH-neutral dish soap into warm water. Soak the piece for two to three minutes, work the solution into recesses with a very soft brush, rinse under running water, then dry completely with a soft cloth.
Dry the back of the piece and the area around any stone as carefully as the front. Trapped water leaves marks and starts tarnish in gaps a cloth cannot reach.
Lay chains flat to dry instead of hanging them wet; the weight of wet links puts strain on the connections.
What to avoid on plated silver
Skip toothpaste, baking soda, salt-and-foil baths and cream polishes. They are abrasive or chemically aggressive, and on plated stock they take off the finish rather than restore it.
Skip ultrasonic cleaners on pieces with glued stones, and on plated pieces generally. The vibration can lift plating at edges and loosen settings.
If a piece has already worn through at a high-contact point, cleaning will not fix it. The realistic options are re-plating or selling it as a matte or oxidised finish.
Storage and packaging that keep stock saleable
Store pieces individually in anti-tarnish bags or lined trays, with a desiccant sachet in the box. Tarnish is a reaction with sulphur compounds in the air, and sealed storage slows it sharply.
Keep stock away from cardboard, rubber bands and foam that contain sulphur. A piece that arrives bright and sits in the wrong box for three months can look aged before anyone wears it.
For wholesale shipments, specify anti-tarnish packaging alongside the plating. It adds little per unit and it protects the very finish the plating was applied for.