Cleaning with baking soda works best on grease, mild odours and everyday grime such as sink marks, fridge smells and light bathroom soap scum. Sodium bicarbonate is mildly alkaline and slightly abrasive, so it lifts oily residue and neutralises smells without the fumes of stronger chemical cleaners. It will not disinfect a surface or strip heavy limescale on its own, so it works best as a gentle everyday helper rather than a single fix for every job.
Cleaning with baking soda: what it actually does
Baking soda has a pH of around 9, which makes it mildly alkaline. That property helps it cut through fatty, oily residue on cookers and worktops, since grease responds better to alkaline cleaners than acidic ones. Its crystal structure is also fine enough to scrub without scratching most hard surfaces, yet gritty enough to lift stuck-on grime. The US Food and Drug Administration treats sodium bicarbonate as generally recognised as safe, which is why it turns up in toothpaste and antacids as well as cleaning cupboards.
What it does not do is kill bacteria or viruses. If a surface needs disinfecting, such as a chopping board after raw meat or a bin that has held food waste, baking soda can deodorise it afterwards but should not replace a proper disinfecting step.
It is also worth telling baking soda apart from washing soda, sold as sodium carbonate. Washing soda is more alkaline and a stronger degreaser, which is why it turns up in some laundry boosters and dishwasher powders rather than as a gentle scrub. The two are not interchangeable: washing soda is too harsh for the light jobs described below, and baking soda is usually too mild for a heavily soiled laundry load.
Where baking soda works well around the house
- Fridge and freezer odours: leave an open container or a small bowl on a shelf and replace it every month or so.
- Stainless steel sinks and hobs: sprinkle a little onto a damp cloth or sponge and work in circular motions, then rinse well.
- Grease on cooker hoods, extractor filters and oven interiors: make a thick paste with water, spread it on, leave for fifteen to twenty minutes, then wipe off before doing a full kitchen deep clean.
- Carpets and rugs: sprinkle lightly, leave for at least fifteen minutes so it can absorb odours, then vacuum thoroughly.
- Bins, gym bags and trainers: a spoonful left overnight cuts down on lingering smells.
- Grout lines: work a paste into the lines with an old toothbrush, then rinse with clean water.
Surfaces and materials to avoid
Because it is mildly abrasive, baking soda is not suitable for every surface. It can dull polished marble and other natural stone over repeated use, and it is gritty enough to leave faint scratches on glass, ceramic hob tops, quartz worktops and gold or silver plated fittings if you scrub hard. Waxed or oiled wood is better cleaned with something gentler too, since the grit wears through a protective finish over time.
Why mixing it with vinegar is not the boost people expect
Sprinkling baking soda and then spraying vinegar over it is a common tip, and the fizzing looks like it is doing serious work. Chemically, though, an acid and a base neutralise each other on contact, producing water, carbon dioxide and a mild salt called sodium acetate. Once the bubbles settle, both ingredients have mostly cancelled each other out, so you are left scrubbing with salty water rather than a strong cleaner. The reaction itself is harmless, so it is not a hazard, but it does waste the individual strengths of each product. Baking soda cuts through grease and neutralises odours on its own. Vinegar's acidity is what breaks down mineral scale, so it is better used by itself when you are removing limescale from taps and tiles.
A simple weekly routine using baking soda
- Wipe down the hob and worktops with a damp cloth dipped in a little baking soda to lift the week's grease.
- Sprinkle a thin layer inside the bin before it is emptied, to keep odours down between collections.
- Check the fridge's odour absorber and top it up or replace it if it has gone hard or discoloured.
- Scrub the sink and taps with a baking soda paste, then rinse and dry to avoid new water marks.
- If carpets or a car interior smell stale, sprinkle, leave for fifteen minutes and vacuum before guests arrive.
- Store the box somewhere dry and airtight once opened, since it absorbs moisture and odours from its surroundings, which shortens how long it stays effective.
A little goes a long way. A tablespoon mixed into a small bowl of warm water covers most sink and worktop jobs, and a full cup is plenty for a bin or a fridge. Using more does not make it work faster, it just means more rinsing afterwards to avoid a chalky residue on taps and steel surfaces.
None of this replaces a full clean when a room needs one. For grubby grout, tired grouting or a bathroom that needs more than a wipe down, pair baking soda with the steps in our guide to deep cleaning a bathroom without harsh chemicals.