TL;DR
Tarnish is not dirt -- it is silver sulfide, a chemical film formed when silver reacts with sulfur compounds in ordinary air. That distinction matters because scrubbing removes silver along with the tarnish. Start with a wash, move to a treated silver polishing cloth, and save chemical dips for plain pieces you are willing to risk. Dry storage in a sealed bag prevents most of it.
What tarnish actually is
Sterling silver is 92.5 percent silver and 7.5 percent other metals, usually copper. Both react with sulfur.
Sulfur compounds are everywhere in trace amounts: in air, in wool and felt, in rubber bands, in eggs and onions, in some lotions, in perspiration. Silver combines with them to form silver sulfide, which is black, and copper adds its own darker oxides.
That film sits on the surface. Removing it means either lifting it off mechanically, which takes a little silver with it, or converting it back chemically, which does not.
Humidity accelerates the reaction. So does skin contact for some people, which is why one person's silver ring stays bright for years and another person's darkens in a month. That is body chemistry, not hygiene.
Antiqued or oxidized silver has tarnish deliberately applied and darkened into the recesses of a design. Polishing that piece all over removes the intended contrast and cannot be undone at home.
How do you clean tarnished silver jewelry?
Wash it first in warm water with a little mild dish soap to remove oil, dry it fully, then rub gently with a treated silver polishing cloth along the length of the piece rather than in circles. For detailed or heavily tarnished items, a silver polish paste applied sparingly and rinsed off works better.
Start with the gentlest thing that works
Step one: wash. Warm water, a few drops of mild dish soap, a soft brush for crevices, rinse in clean water, dry completely with a soft cloth. Sometimes what looked like tarnish was mostly skin oil and film.
Step two: a treated polishing cloth. These cloths carry a mild polishing compound and often a tarnish inhibitor. Rub with light pressure in straight strokes. The cloth will turn black, which is the tarnish coming off. Do not wash the cloth -- washing removes the compound.
Step three: silver polish paste. For heavier tarnish or detailed work. Apply a small amount with a soft cloth or cotton swab, work it gently, then rinse thoroughly in warm water and dry completely. Residue left in crevices dries chalky white.
Step four: a jeweler. For antique pieces, anything valuable, heavily oxidized designs, or a piece with stones you are unsure about, professional cleaning is cheap insurance.
Each step removes a little more metal than the one before it, which is the reason to go in order. The same escalation logic applies across cleaning the personal items you use every day.
Why the foil and baking soda trick is risky
The popular method -- aluminum foil, hot water, baking soda, sometimes salt -- is a real chemical reaction. Aluminum is more reactive than silver, so in a hot alkaline solution the sulfur transfers from the silver to the aluminum and the tarnish disappears without abrasion.
It works. It also has real problems.
It strips oxidized and antiqued finishes uniformly, destroying the contrast on any piece designed with darkened recesses. There is no way to put that back at home.
It can leave a dull, slightly yellow or matte surface on some pieces, because the reaction does not restore polish, only removes sulfide.
It is unsafe for pearls, opals, turquoise, coral, amber, and glued settings, all of which dislike hot water and alkaline solutions. It is also inappropriate for silver plate, where the plating layer is thin and any surface loss shows.
Commercial dip solutions have the same profile: fast, effective on plain sterling, and destructive to finishes and soft stones. Never combine a dip with anything else, and never mix cleaning products in one container -- that is where genuine chemical hazards come from.
If a piece has pearls or opals in it, stop and read how to clean pearls without damaging them first.
What not to use on silver
Toothpaste. Widely repeated advice, and it leaves fine scratches because toothpaste is abrasive by design. It dulls polish permanently.
Baking soda paste scrubbed directly on the metal. Same problem. Baking soda is a mild abrasive.
Household scouring powders and steel wool. Obvious, but people try it.
Bleach. It accelerates tarnish rather than removing it, and it damages some settings. Never mix it with anything.
Ultrasonic cleaners on antiqued or stone-set pieces. Fine on plain sterling, damaging to soft stones, treated stones, and glue.
Rubber bands to bundle pieces. Rubber releases sulfur compounds and will leave a black line exactly where the band sat.
Plated jewelry is an entirely different problem, since there is almost no metal to remove -- see how to clean costume jewelry without ruining it.
How do you stop silver from tarnishing?
Store each piece in a sealed plastic bag with the air pressed out, or in a tarnish-resistant cloth pouch, kept somewhere dry. Add an anti-tarnish strip to a jewelry box. Keep silver away from wool, felt, rubber, newspaper, and bathroom humidity, and put it on after lotion and perfume.
Storage that actually prevents it
Air is the enemy, so remove the air.
Small zip-top bags with the air squeezed out work as well as anything expensive. One piece per bag, so nothing scratches anything else.
Anti-tarnish strips absorb sulfur compounds and are worth adding to a jewelry box or a drawer. They do expire, so replace them every six months or so.
Silica gel packets from packaging control humidity and are free.
Avoid storing silver in a bathroom. Humidity plus the sulfur compounds in some personal care products is the worst combination there is.
Wearing silver regularly genuinely slows tarnish, because contact and gentle friction disturb the film before it thickens. Pieces left in a drawer for a year come out darkest.
Source: Smithsonian Institution Museum Conservation Institute guidance on the care of silver
Silver plate and mixed pieces
Silver plate is a thin layer of silver over a base metal, and it can be polished through. Once the base metal shows, only replating fixes it. Treat plate with the gentlest method that works and never use a dip or an abrasive on it.
Mixed-metal pieces -- silver with gold accents, or silver with plated details -- need the more delicate metal to set the method. Gold has its own rules, covered in how to clean gold jewelry at home safely.
If you cannot tell whether something is sterling, plate, or something else entirely, a jeweler can identify it quickly. Guessing is how thin plating disappears.
FAQ
What causes silver jewelry to tarnish?
Tarnish is silver sulfide, formed when silver reacts with sulfur compounds present in ordinary air, in wool and rubber, in some foods, and in perspiration. Humidity speeds the reaction up. It is a chemical film on the surface, not dirt, which is why washing alone does not remove it.
Can you use toothpaste to clean silver?
No. Toothpaste contains abrasives meant for tooth enamel, and silver is soft enough that those abrasives leave fine scratches and permanently dull the polish. They also pack into crevices around settings. Use a treated silver polishing cloth or a proper silver polish paste instead.
Does the aluminum foil and baking soda method work on silver?
It does work chemically, transferring sulfur from the silver to the aluminum without abrasion. But it strips antiqued and oxidized finishes uniformly, can leave a dull surface, and is unsafe for pearls, opals, turquoise, glued settings, and thin silver plate. Use it only on plain sterling.
How do you keep silver jewelry from tarnishing?
Store each piece in a sealed bag with the air pressed out or a tarnish-resistant pouch, somewhere dry and away from bathroom humidity. Add anti-tarnish strips to a jewelry box and replace them every six months. Keep silver away from wool, felt, rubber bands, and newspaper.
Is it safe to clean antiqued silver jewelry?
Only very carefully. Antiqued or oxidized pieces have darkening applied on purpose in the recesses of a design, and polishing or dipping removes it evenly, flattening the contrast. Wash with mild soap, dry, and polish only the raised areas lightly. A jeweler can restore a finish if it is lost.
Can tarnished silver be cleaned without chemicals?
Yes. A wash in warm water with mild dish soap followed by a treated silver polishing cloth handles most everyday tarnish with no dips or solutions involved. Regular wear also helps, since contact and gentle friction disturb the film before it has a chance to thicken.
Jewelry is quick. The dresser, drawers, and the rest of the house are not. If you would rather hand that part off, get a quote or read more about house cleaning services.