Baking Soda (Bicarbonate of Soda): The Forgotten Pantry Hero That Neutralises Odours

Not the melodramatic “something’s rotten” sort of situation, but that weary, sour blend of yesterday’s garlic pasta, a damp sponge and rooms that haven’t been aired. The kind of smell that hangs in the kitchen and silently judges your decisions.

Most of us know the moment: you open the door hoping for that comforting “home” scent… and instead get hit with a wave of badly organised fridge and a bin that really should have gone out. You fling the windows wide, spritz an air freshener that smells more like chemicals than any “ocean breeze”, and even light a scented candle that claims it will “purify the air”. The result? Vanilla… with an undertone of rubbish.

One day, in the home of an English grandmother who swore by what she kept in her cupboards, I saw a different approach. No sprays, no gadgets-just an old, open jar tucked discreetly in a corner. And the air felt oddly neutral, almost clean. She shrugged and said: “It’s just this old pantry thing.”

She was talking about an ingredient you very likely already have at home-stored away, half-forgotten-and it quietly gets on with the job of tackling bad odours.

The forgotten pantry hero that actually eats odors

The culprit-really, the hero-is baking soda (bicarbonate of soda): that unglamorous little box you shove to the back of the cupboard, promising yourself you’ll use it “one day” for baking. It’s bland, it looks like nothing, and yet it doesn’t merely hide smells. It genuinely neutralises them.

Set in the fridge, sprinkled into the bottom of a clean bin, or left in a small dish near the sink, this everyday powder binds with the molecules responsible for those stubborn lingering whiffs. It doesn’t layer a synthetic fragrance on top. It does something quieter: it switches the odour off, a bit like turning down a radio that’s been too loud for too long.

What’s striking is how understated it is. No bright colours, no heavy advertising, no ridiculous promises-just a cheap white powder that often sits near the salt. And yet, in plenty of British homes, it’s the first thing people reach for when the fridge starts smelling of cheese, or the hallway reeks of post-match trainers. It’s a habit many on the Continent have drifted away from, tempted instead by “luxury hotel” room sprays.

Research from the Arm & Hammer Institute (the product’s long-standing American brand) found that baking soda can cut certain compounds linked to food odours by more than 70 % in a fridge after three days of exposure. That’s not poetic marketing-it’s a plain figure. In everyday terms, it means something wonderfully simple: you open the fridge and you smell… almost nothing.

Picture a city flat after a dinner of curry, fish, cheese and wine. The next morning, the air still carries that faint, mixed-afterglow of last night. A London family I met routinely puts a small bowl of baking soda on the worktop when they cook anything heavily spiced. “It just flattens the smell overnight,” the mum told me, rolling up her sleeves to wipe down the counter. By morning, it smells of fresh coffee-not reheated curry from the night before.

In a student house-share in Manchester, baking soda is the official remedy for the “shame fridge”. Whenever someone forgets a questionable food tub, the stench doesn’t linger as long. Not because anyone has scrubbed everything with bleach, but because an open box of white powder sits quietly on the middle shelf, doing its work. It feels almost unfair that something so ordinary can solve a problem so stubborn.

The chemistry behind this small “miracle” is refreshingly straightforward. Baking soda is a mild alkali. Many unpleasant smells come from volatile acidic compounds. When those molecules meet baking soda, a reaction occurs that neutralises some of the odour-causing compounds. You’re not covering the smell-you’re changing what’s creating it.

That’s why it performs so well in enclosed spaces: the fridge, a shoe cupboard, a laundry basket, even inside a gym bag. With limited airflow, odour molecules gather and hang around, and baking soda acts like a sponge for smells. It’s not flashy, but over time it’s seriously effective.

And unlike plenty of DIY “deodorisers” made with essential oils, it doesn’t add an extra fragrance that can overwhelm anyone sensitive to strong scents. Clean air doesn’t need to smell of lavender. Sometimes the real luxury is simply… that it doesn’t smell of anything.

How to use baking soda to clear the air, room by room

The most effective method is also the one people overlook: take a small open container, add 2–4 tablespoons of baking soda, and place it where the smell is. In a fridge, pick a stable spot-often a door shelf or an upper shelf-so it won’t tip over. Keep it uncovered (no lid, no cling film) so the powder is directly exposed to the air.

For the bin, dust a thin layer into the bottom of a fresh liner before you start filling it. You can also add a little to the bottom of the bin itself, under the bag. For shoes, put a teaspoon into each shoe in the evening, leave it for at least a few hours, then shake it out into the sink or bin in the morning. It’s a small, almost automatic habit that can make a noticeable difference in a tiny flat.

Let’s be realistic: hardly anyone does this perfectly every day. Life gets busy. That’s where baking soda shines-it still helps even if you’re not consistent. The most common mistake is leaving the same bowl or box in place for too long. After more than a month in a fridge, the powder is saturated and has taken on all it can. The air won’t suddenly get worse, but the impact drops off significantly.

Another classic misstep is tipping in loads at once, assuming “more is better”. In practice, a thin layer spread across a wider surface works better than a dense mound. Air needs to circulate around the grains. And if you’re tempted to scent it with essential oils, do that in a separate dish instead-mixing them can create damp, clumpy bits that work far less well.

Our relationship with smell is personal-almost part of identity. One reader told me:

“I felt embarrassed inviting friends over because my flat always smelled of frying. When I started putting baking soda near the hob and in the fridge, the smell slowly faded. It wasn’t magic, but it was the first time I felt like I was taking control of my own space again.”

To keep it simple, here are a few practical uses worth remembering:

• Fridge: a small open bowl of baking soda, replaced every 4 to 6 weeks.
• Bin: a thin layer in the bottom of the liner and under the liner, renewed each time you change the bag.
• Bathroom: a glass with two tablespoons placed behind toiletries, replaced monthly.
• Shoes: a teaspoon per shoe, left overnight, two to three times a week during heavy use.
• Linen cupboard: a small dish on a shelf, away from clothing, replaced every two months.

Why this humble powder beats perfumed sprays long term

What’s happening here is more than a mere “old wives’ tip”. It’s a gentler, less aggressive way of looking after your home. Instead of blasting your living room with industrial fragrances that promise “Nordic forests”, you let a neutral powder work quietly in the background-like a silent filter. You barely notice it, it makes no noise, and it doesn’t hit you in the face.

Financially, the contrast is stark. A box of baking soda costs very little and can last for weeks if you portion it out sensibly. Sprays and plug-ins, on the other hand, disappear quickly, need refills, and add up at the checkout. With prices rising across the board, that small white box becomes a quiet form of resistance in the cupboard.

There’s also something symbolic about choosing not to “perfume” your home into being acceptable. That a normal home smell-coffee, clean laundry, wood, and sometimes rain on the balcony-is enough. Passing on this almost-forgotten ingredient is passing on a small, practical power: deciding what the air you breathe should be like, without wrapping it in artificial scent.

Key point	Details	Why it matters to readers
Choose shallow, open containers	Spread 2–4 tablespoons of baking soda in a small bowl or jar with a wide opening so the surface is exposed to air.	A larger exposed surface helps the powder “catch” more odour molecules, so the air feels fresher sooner.
Swap it out every 4–6 weeks	Once the powder is saturated, its odour-absorbing power drops; set a reminder in your calendar or on your phone.	Regular replacement keeps the effect strong instead of fading so gradually you don’t notice.
Treat hotspots rather than whole rooms	Prioritise fridges, bins, shoe areas, laundry baskets and under-sink cupboards instead of placing bowls everywhere.	You use less product, spend less, and address the source of the smell rather than the empty air.

FAQ

• Can I still cook or bake with baking soda that’s been used to absorb odors? No. Once it has been used as an odour absorber, keep it for cleaning (sink, toilet, grout) and use a separate, sealed box for cooking. The old batch has already reacted with compounds in the air, so it won’t perform properly in baking or taste right.
• How long does it take to notice a difference in odor? In a fridge or a small bathroom, you can often notice a change within 24 to 48 hours. For a bin or heavily used shoes, it can take two or three cycles (several nights for shoes, a few days for a bin) before the odour properly settles.
• Is baking soda safe around pets and kids? Yes, as long as they aren’t spooning it into their mouths. It’s considered low-toxicity, but keep open bowls out of easy reach. If a child or pet licks a little, rinse their mouth with water and keep an eye on them. If a large amount is swallowed, calling a doctor or a vet is the sensible next step.
• Can I mix baking soda with vinegar to fight odors? You can, but it foams and neutralises quickly. It’s great for cleaning a trap or helping clear a sink, but less useful for long-term odour control. To absorb smells in the air, it’s better to leave baking soda dry and on its own in an open container.
• Does baking soda work for cigarette or smoke smells? It helps a bit-especially on fabrics (carpets, sofas, mattresses) if you sprinkle it on before vacuuming. But smoke odours are stubborn and cling to walls, curtains and ceilings. Baking soda can reduce them, not wipe out years of nicotine in one go.
• What’s the best way to use it on carpets or sofas? Apply a thin, even layer, leave it for at least 30 minutes (or overnight for an older sofa), then vacuum slowly. Use a fine powder to avoid visible residue, and always test a small hidden patch before treating the whole item.

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