How to Clean Antiques Safely (Without Destroying Value)

Cleaning an antique feels like the obvious first step. But over-cleaning is one of the most common ways people reduce value. The rule: do the least you can, gently, and stop if in doubt.

Before anything: identify it

Know what you have before you clean — a rare piece may need a professional. Scan it with AntiqueIQ for an identification, era and estimated value range. If it might be valuable, ask a specialist first.

Wood furniture

• Dust with a soft, dry cloth.
• For grime, use a barely damp cloth with mild soap, then dry immediately.
• Avoid silicone sprays and harsh polishes.
• Don't strip or refinish original finishes — see should you restore antiques.

Silver

• Wash in warm water with mild dish soap, dry immediately.
• Use a gentle silver polish sparingly, rubbing in straight lines.
• Don't polish hallmarks away.
• Avoid dips on items with patina you want to keep.

See silver hallmarks guide.

Brass and copper

Many collectors prefer original patina. Gentle cleaning with mild soap is fine; heavy polishing is a personal choice for decorative pieces, but avoid it on valuable items. See antique brass value.

Porcelain and pottery

• Wash by hand in lukewarm water with mild soap.
• Never use a dishwasher.
• Be careful with gilding and overglaze decoration, which can wear off.
• Avoid soaking pieces with old repairs or unglazed areas.

Glass

• Hand-wash in lukewarm water; avoid temperature shocks.
• No dishwasher — it can cloud and etch glass permanently.

Coins

Don't clean coins. It almost always lowers value. See old coins worth money.

Paintings and works on paper

Don't clean them yourself. Solvents and water can remove paint and damage paper. Consult a conservator.

Textiles and rugs

Vacuum gently through a screen or mesh. Don't machine-wash old textiles. Consult a textile conservator for stains.

Frequently asked questions

Does cleaning antiques reduce value?

Over-cleaning, polishing, stripping and refinishing can. Gentle dusting and mild washing usually don't.

Should I polish antique silver?

Lightly, if desired, but avoid over-polishing and protect hallmarks.

Can I clean old coins?

No. Cleaning almost always reduces their value.