Baking Soda: The Natural Cleaning Staple That Earns Its Place

Walk through any cleaning aisle and you'll see baking soda showing up everywhere, in scrubs, deodorizers, toothpastes, and laundry boosters. But what does science actually say about it? As a company that only uses products we can stand behind, we think it's worth taking an honest look: where baking soda shines, where it falls short, and a few common myths that need to be put to rest.

What Is Baking Soda, Exactly?

Baking soda is sodium bicarbonate (NaHCO₃), a naturally occurring mineral compound with a pH of around 9. That mild alkalinity helps it break down dirt, grease, and sticky residues, while its fine particle structure gives it a gentle scrubbing action that cleans without scratching most surfaces.

It is also biodegradable, non-toxic to aquatic life, and free of chlorine and petrochemical solvents, which is exactly why it has a place in Lumina's cleaning toolkit.

Where Baking Soda Actually Works

• In the kitchen. Baking soda raises the pH on contact, which turns fatty acids into water-soluble soaps and loosens baked-on food soils. It also acts as a gentle scrub. Think stovetops, sinks, pots and pans, and countertop grime, it handles all of it well.

  
  

• On odors. Most air fresheners just cover smells up. Baking soda actually neutralizes them. It works by chemically reacting with acidic odor molecules, changing their composition so they stop releasing smell into the air. A peer-reviewed study in the journal Waste Management found it reduces food waste odor by around 70%. That same principle applies to trash cans, refrigerators, carpets, and fabrics. One thing worth noting: it works on acid-based odors specifically, so it won't neutralize every smell.

  
  

• In the laundry. Added to a wash cycle, baking soda boosts the performance of liquid detergent and neutralizes sour or musty fabric smells. For a standard load, half a cup is the right amount. Add it directly into the drum before loading your clothes. Not in the dispenser drawer, as it can clump and clog your machine. It works in cold water and is safe for both standard and high-efficiency washers, as well as septic systemsIn the bathroom. Tubs, tile, sinks, and fiberglass all respond well to baking soda. 

• In the bathroom.Used with a soft sponge, it lifts soap scum and grime without scratching glazed surfaces.

Where to Be Careful, Or Skip It Entirely

Natural stone: marble, limestone, travertine, and granite. This is one of the most important things to know. Baking soda is alkaline with a pH of 8.4 to 9, which can damage marble. Frequent use could dull the surface. Marble and other calcareous stones are calcium carbonate-based and can react with alkaline pastes, causing subtle etching or loss of sheen. Even for granite, routine or aggressive use is not recommended. In homes with stone countertops or floors, we always reach for a pH-neutral stone-safe cleaner instead.

Hardwood and sealed wood floors. Baking soda can break down the protective sealant on finished wood over time. Repeated use risks dulling the finish and leaving the wood vulnerable to moisture and staining.

Aluminum. Baking soda's abrasive nature can damage lightly sealed surfaces or cause discoloration on some metals. Aluminum pots, pans, or fixtures should be cleaned with a gentler, pH-neutral option.

Anywhere a true disinfectant is needed. This one is critical. Limited peer-reviewed evidence exists for baking soda's antimicrobial activity on hard surfaces. Because the pH of baking soda in a neutral solution equilibrates at a maximum near 8.34, its pH alone is likely insufficient to inhibit the growth of many foodborne microorganisms. Baking soda does not kill pathogens like Staphylococcus aureus, penetrate porous grout to eliminate mold colonies, or provide the kind of disinfection needed in bathrooms or kitchens where raw meat has been prepared.

The Vinegar + Baking Soda Myth

This is one of the most popular DIY cleaning combinations out there,  and one of the most misunderstood. That satisfying fizz feels powerful, but the science tells a different story.

When baking soda and vinegar mix, they react immediately and produce sodium acetate, water, and carbon dioxide gas. The fizzing is just that : gas being released. By the time it settles, you are left with a dilute, neutral solution that has no real cleaning power. The alkalinity that makes baking soda effective on grease is gone. The acidity that makes vinegar useful on mineral deposits is gone too.

They each work well on their own. The key is using them separately and knowing which one fits the job.

How We Use It at Lumina

Baking soda earns its place in a few specific situations. A paste with water applied to the oven interior or stovetop grates loosens baked-on grease in 15 to 20 minutes without harsh fumes.

In the bathroom, it lifts soap scum from tubs, tile, and sinks without scratching.Half a cup in the laundry drum gives detergent a boost on musty towels or workout clothes.

We skip it entirely on natural stone, marble, hardwood floors, and aluminum; those surfaces need a different approach. And we always rinse thoroughly after use to avoid any white residue.

Clean does not have to come at a cost to your home's surfaces or the environment. Understanding the real science behind everyday ingredients is one of the ways we earn your trust, one clean at a time.

Love,

Alex

Lumina Cleaning & Organizing

Sources

Waste Management journal - Baking soda odor reduction study (70% finding) https://www.sciencedirect.com/science/article/abs/pii/S0956053X14004395

PubMed / National Library of Medicine - study abstract https://pubmed.ncbi.nlm.nih.gov/25445259/

McGill University Office for Science and Society - Odor neutralization mechanism  https://www.mcgill.ca/oss/article/general-science-you-asked/can-baking-soda-really-absorb-odors-fridge

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