The shine your pooja room deserves
Every year, a few weeks before Diwali, the same ritual begins in Indian homes. The brass diyas come down from the loft. The copper kalash, the pooja thali, the bell, the little Lakshmi idol — all of them come out looking dull, brown, sometimes with stubborn green spots.
Getting them to shine again is part of the festival. But it can also mean hours of scrubbing with tamarind and salt, sore fingers, and the worry that you're scratching something your grandmother handed down.
This guide covers why brass and copper tarnish, the traditional methods that work (and where they fall short), what to avoid so you don't damage heirloom pieces, and a simpler bioenzyme way to get your pooja items ready before Dhanteras.
Why brass and copper lose their shine
Tarnish isn't dirt — it's the metal reacting with the air around it. Copper, and brass (an alloy of copper and zinc), slowly combine with oxygen, moisture and sulphur in the air to form a thin dark layer on the surface.
A few things speed this up in a pooja room:
- Oil and ghee from diyas leave a sticky film that traps dust and darkens quickly.
- Humidity, especially after the monsoon, accelerates oxidation.
- Kumkum, haldi and vibhuti stain the surface and can leave patchy marks.
- Water left standing in a kalash or lota creates spots and rings.
If you see green or blue-green patches, that's verdigris — a heavier form of copper corrosion. It's common on items that stayed damp in storage, and it needs a little more patience to lift.
Traditional home methods: what works and what doesn't
Our grandmothers knew what they were doing. Most traditional methods rely on a mild natural acid (tamarind, lemon) plus something gritty (salt, ash) to lift tarnish. They work — the trade-off is time and effort.
| Method | How it's used | Works well for | Watch out for |
|---|---|---|---|
| Tamarind + salt | Soak tamarind pulp, rub on with salt, rinse | Light to medium tarnish on diyas and thalis | Slow on heavy tarnish; pulp gets into carvings |
| Lemon + salt | Rub half a lemon dipped in salt over the surface | Copper bottles, lotas, small items | Salt can leave fine scratches on polished or delicate pieces |
| Besan (gram flour) paste | Mix with water or lemon, apply, let dry, rub off | Gentle cleaning of idols | Weak on heavy tarnish; residue in crevices |
| Wood ash / ritha | Rub ash with a damp cloth, rinse | Oily diyas with soot | Messy; ash is abrasive on soft brass |
| Vinegar + salt | Wipe on, leave briefly, rinse | Quick results on copper | Strong smell; can leave pink patches on brass if left too long |
All of these need a thorough rinse and immediate drying — leftover acid or moisture starts the tarnish again.
What to avoid on heirloom brass and copper
When you're short on time before a festival, it's tempting to reach for the strongest thing under the sink. For pooja items, that usually backfires.
- Toilet-bowl acids and "tezaab" (harsh mineral acids). They strip tarnish fast, but also eat into the metal surface, leaving it pitted, pinkish and quicker to tarnish again. The fumes are unpleasant in a closed pooja room.
- Steel wool and harsh scrubbers. They leave scratches that dull the shine permanently and trap dirt in future.
- Bleach. It does nothing for tarnish and can discolour metal.
- Dishwashers and long soaks. Prolonged water exposure is how tarnish and green spots start.
The goal is to dissolve the tarnish layer gently, not grind away the metal under it.
The easier way: a bioenzyme brass and copper cleaner
Ecoroot's Bioenzyme Brass & Copper Cleaner works on the same principle as tamarind and lemon — citrus power — without the pulp, the mess or the hours of rubbing.
It starts with citrus peels that we ferment for 90 days in our in-house factory. Over those three months, natural fermentation turns the peels into a bioenzyme concentrate that helps loosen tarnish, oil and grime. That concentrate is the heart of the cleaner. It's free from phosphates, chlorine and bleach, synthetic dyes and parabens, and it has a light lemon scent.
How to use it:
- Wipe off loose dust and oil. For oily diyas, rinse first in warm water.
- Apply the cleaner. Pour a small amount onto a soft cloth or sponge, or directly on the tarnished area.
- Let it sit for 2–3 minutes. Give the bioenzymes time to work on the tarnish. For heavy tarnish or green spots, leave it a little longer.
- Rub gently. Use a soft cloth, sponge or old toothbrush for carvings and edges. No hard scrubbing needed.
- Rinse well with clean water.
- Dry immediately with a soft, dry cotton cloth. This step is what keeps the shine from fading fast.
Very old or heavy tarnish may need a second round. That's normal — it's still far quicker than tamarind.
Item-by-item tips for your pooja room
| Item | What usually goes wrong | Tip |
|---|---|---|
| Diyas and samai (oil lamps) | Burnt oil, soot and wick residue | Remove old wicks and wash off oil with warm water and dishwash liquid before treating tarnish |
| Kalash and lota | Water rings, green spots inside | Clean the inside too; dry upside down so no water collects |
| Pooja thali | Kumkum and haldi stains, scratches | Treat stains first, then do the whole surface evenly for a uniform shine |
| Idols (brass, panchaloha) | Tarnish in fine carvings | Use a soft toothbrush; skip painted, gold-plated or lacquered parts |
| Urli | Large surface, water stains from floating flowers | Work in sections so the cleaner doesn't dry on the surface |
| Bells and ghanti | Tarnish on the handle from frequent handling | Clean the handle and dome separately; dry the inside |
| Copper water bottles and tumblers | Dark interior from daily water storage | Rinse the inside thoroughly after cleaning and let it air-dry fully before refilling |
If an item has a deliberate antique finish or patina, or is lacquered (a glossy coating that doesn't tarnish), don't polish it. Test on a small hidden spot when in doubt.
How to keep the shine through the festive season
A few small habits make the difference between a shine that lasts weeks and one that fades in days.
- Dry everything completely after cleaning, including inside lamps and kalash.
- Wipe diyas after each use while the oil is still soft. Cold, hardened oil is harder to remove.
- Give items a quick wipe once a week with a dry cotton cloth to remove fingerprints and dust.
- Store pieces dry and wrapped in a cotton cloth after the festival, not in plastic, which traps moisture.
- Keep a small bottle handy for touch-ups between Dhanteras, Diwali and Karthika Masam deepams, rather than one big scrub.
Frequently asked questions
How often should I clean brass pooja items?
A light wipe weekly and a proper clean every 4–6 weeks is enough for most homes. Diyas used daily need wiping after each use.
How do I remove green spots from copper?
Those are verdigris. Apply the cleaner, give it a few extra minutes, and work the spot gently with a soft brush. Old spots may need two or three rounds.
Can I clean the inside of my copper water bottle with it?
Yes. Rinse the inside very thoroughly with clean water afterwards and let it dry fully before you fill it again.
Will it damage gold-plated or painted idols?
Avoid plated, painted and lacquered surfaces with any tarnish remover. Clean only the bare brass or copper areas.
Is it gentle on hands?
It's free from bleach and harsh mineral acids. For long cleaning sessions or if you have sensitive skin, wearing gloves is still a good idea.
Can I use it on silver?
It's made for brass and copper. For other metals, test a small hidden spot first.
Get your pooja room festival-ready
Dhanteras is on 6 November and Diwali on 8 November. Start with the pieces you use most — diyas, kalash and thali — and work through the rest over a couple of evenings instead of one marathon session.
Try the Ecoroot Bioenzyme Brass & Copper Cleaner. A 50ml trial pack is enough to test on a few diyas, and the 500ml covers a full pooja room clean.
While you're deep-cleaning for Diwali, our bioenzyme floor cleaner and toilet cleaner take care of the rest of the house, fermented the same way.
