House of MahMah Tea | Product Care

Copper Care & Restoration Guide

Pure copper develops a natural patina over time. But a dishwasher can cause dramatic discoloration, water spots, and possible surface etching. Here is the gentle cleaning method we used on our own solid, unlined copper cup—shown in real before-and-after photographs.

HAND-WASH ONLY. NEVER PUT YOUR COPPER CUP IN THE DISHWASHER.

A real copper cup: before and after

Our cup became dark and blotchy after an accidental dishwasher cycle. Lemon and salt, followed by a thorough rinse and a hand wash with Palmolive dish soap, restored much of the reddish copper color. Some exterior spots remained. Results vary; cleaning may not reverse chemical etching.

For everyday care

1. Wash by hand with warm water, a little mild dishwashing liquid (such as Palmolive), and a soft, non-scratch sponge.
2. Rinse thoroughly with clean water.
3. Dry immediately using a clean, soft microfiber towel. Do not leave standing water in the cup.

Some darkening over time is normal for bare copper. A shiny finish is a cosmetic preference—not a reason to use an acidic cleaner every day.

Occasional restoration: lemon & salt

Only for solid, bare, uncoated copper. Do not use this method on lacquered, plated, or specially patinated products without manufacturer approval.

1. Start with a spot test. Test an inconspicuous area with a little fresh lemon juice and a pinch of fine table salt on a soft cloth.
2. Gently rub for approximately 15–30 seconds. Use light pressure, and never scrub with abrasive pads. Do not let the acidic mixture soak or dry on the copper.
3. Rinse promptly and thoroughly to remove the lemon and salt.
4. Hand-wash with mild dish soap and a soft sponge, including any area that contacted the cleaning mixture.
5. Rinse again, then dry immediately with a soft towel.

DO NOT DO THIS EVERY DAY.

Lemon-and-salt cleaning is an occasional tarnish-removal treatment, NOT a daily washing routine. Repeated acid treatment or friction can gradually wear and scratch the copper surface. For normal daily cleaning, use mild dish soap, water, and a soft cloth only.

Still spotty? When to repeat—and when to stop

If a few dark tarnish spots remain and the copper still feels smooth, you may carefully repeat one short, gentle spot treatment on the affected area after completing the rinse, soap-wash, and drying steps. Rinse, wash, and dry again. Do not keep scrubbing repeatedly in one session or try to force a mirror finish.

If spots do not improve, or the surface feels rough or etched, stop treating it with lemon and salt. Dishwasher-related etching and pitting may not be reversible with cleaning.

Other gentle products and options

• Mild dish soap + warm water: the preferred choice for routine care. Use a soft sponge or microfiber cloth.
• Plain lemon juice on a soft cloth: an occasional spot-treatment alternative for bare copper if you prefer to avoid salt abrasion. Rinse promptly, hand-wash, and dry.
• Non-abrasive copper polish labeled for copper: for stubborn exterior tarnish, a product such as Wright's Copper Cream may help. Follow the product label, test a small exterior spot first, rinse fully, and dry. We recommend keeping commercial polish off the inside drinking surface unless its manufacturer explicitly confirms that application is appropriate for food-contact use. Do not use on lacquered finishes.

Never use: a dishwasher, bleach, steel wool, harsh scouring powders, abrasive brushes, prolonged acidic soaking, or mixed household cleaners.

An important note about unlined copper

Because these cups have an exposed copper interior, avoid acidic beverages—including lemon water, fruit juice, wine, and acidic teas or coffee. The FDA Food Code restricts bare copper contact with foods and drinks below pH 6 because copper can leach into them. Use for plain, non-acidic drinking water; do not store beverages in the cup for prolonged periods. If the interior shows deep pitting, flaking, persistent blue-green corrosion, or other damage, discontinue drinking use and seek a qualified assessment.

For additional food-contact guidance, see the FDA Food Code. For an example of product-specific polish instructions, see Wright's Copper Cream directions.

House of MahMah Tea | A little care goes a long way. Keep your copper beautiful by hand-washing and drying after every use; reserve restoration treatments for occasional stubborn tarnish.