Baking Soda in Laundry: What It Does and When to Use It
Baking soda is often described as a cure for every laundry problem. It is more useful when treated as one optional laundry aid with clear limits. It can help with some odors and can change wash-water chemistry, but it is not detergent, bleach, or a universal stain remover.
The safest starting point is the same for any additive: check the garment label, washer manual, and product directions before it enters the machine.
Quick answer: Baking soda may help freshen some washable loads and can be used as a laundry booster when the washer and garment instructions allow it. Add it to the tub rather than a dispenser unless the appliance manufacturer directs otherwise. Do not use it as a substitute for detergent, and use extra caution with wool, silk, cashmere, and other delicate fibers.
What baking soda can do
Baking soda is sodium bicarbonate, an alkaline compound. In a laundry routine, people commonly use it to help manage odors or support detergent in a washable load. Maytag’s baking-soda guide recommends checking the washer manual and garment care tag first.
Three realistic roles are:
- Odor support: it may help neutralize some acidic odor compounds rather than covering them with perfume.
- A wash booster: it can change the wash-water environment, which may help a compatible detergent work in some conditions.
- A targeted paste: water and baking soda are sometimes used as a pretreatment on durable, washable fabric after a hidden-area test.
“May help” matters. Odor source, fabric, soil, water and wash conditions vary. A successful result on a cotton towel does not prove the same method is appropriate for a silk blouse or coated athletic garment.
What baking soda does not replace
Baking soda is not a complete laundry detergent. Detergents contain surfactants and other ingredients designed to lift and suspend soils so they can rinse away. A spoonful of sodium bicarbonate cannot perform every part of that system.
It also does not replace:
- oxygen or chlorine bleach when a care label and product direction call for a specific bleach;
- an enzyme treatment for a compatible protein stain;
- professional cleaning for a dry-clean-only item;
- correct water temperature and mechanical action; or
- finding and removing the source of a persistent odor.
Do not rely on baking soda to disinfect laundry. When disinfection is required, use a suitable labeled product and follow the garment and appliance instructions.
How to add baking soda to a washer
First, read the appliance manual. Maytag’s guidance says baking soda can go directly into the washer tub and not into the detergent or fabric-softener dispenser. Its example uses up to one-half cup, but that is not a universal dose for every machine or load.
A careful process looks like this:
- Check that every item is washable and does not prohibit the additive.
- Check the washer manual for additive placement and restrictions.
- Measure the amount rather than shaking it freely into the machine.
- Put it in the empty tub if the manufacturer directs that method.
- Add the correctly measured detergent in its proper location.
- Load without packing the drum too tightly.
- Select a cycle and temperature that match the care labels.
If residue remains, do not assume the solution is more product. Review the amount, drum load, water temperature and whether the powder fully dissolved.
When a baking-soda soak or paste may help
A soak or paste creates longer, more concentrated contact than an ordinary wash. That can also increase the chance of changing color or texture.
For a durable washable item whose label allows soaking, Maytag describes this limited pretreatment:
- Test an inconspicuous area for color or texture change.
- Mix equal parts baking soda and water into a paste.
- Gently blot the paste onto the affected spot.
- Soak the item in water for about 30 minutes, then wash according to its care tag.
This is a spot-treatment example, not a recipe for every stain or fabric. Skip it for wool, silk, cashmere, delicate finishes, or a garment whose care directions conflict. If the hidden-area test changes the fabric, stop.
Do not scrub a delicate fiber simply because the ingredient feels mild in the kitchen. Friction and alkalinity can both matter to fabric.
For a valuable, embellished, or unfamiliar piece, use the care label and ask a professional. Freshly Folded’s dry-cleaning pickup service is the relevant path when machine washing is not appropriate.
Fabrics that need more caution
Maytag advises avoiding baking soda on some delicate materials, including wool, silk and cashmere. Those fibers can react poorly to alkaline conditions, agitation, or an unsuitable temperature.
Also pause before treating:
- garments with unstable dyes;
- metallic trims or unknown embellishments;
- leather, suede or fur;
- coated, water-repellent or performance finishes; and
- anything marked dry clean only.
The care label sets the cleaning method. Baking soda does not turn a non-washable garment into a washable one.
Should you mix baking soda and vinegar?
Mixing the two creates fizz because an acid and a base react. The visible bubbles can look powerful, but much of the mixture is neutralizing itself. Using them together does not preserve the original chemistry of either ingredient.
If a manufacturer allows one of them for a specific task, use that ingredient according to its own directions and keep the tasks separate. Do not build a laundry routine around dramatic fizz.
More broadly, never improvise chemical combinations. The CDC’s bleach guidance says never to mix household bleach or disinfectants with other cleaners. Follow the label instead of assuming two familiar products are compatible.
Baking soda versus washing soda
The names sound similar, but the products are not interchangeable. Baking soda is sodium bicarbonate. Washing soda is sodium carbonate and is more alkaline. That difference affects handling, dose, and fabric suitability.
Use the exact product named in a tested instruction. Do not substitute washing soda for baking soda at the same amount, and do not infer that a stronger alkali is automatically a better cleaner.
The same rule applies to detergent formulas that list sodium bicarbonate as one ingredient. A formulated detergent also contains cleaning agents and supporting ingredients. Our Tide versus Arm & Hammer comparison evaluates two finished detergents; a box of plain baking soda is a different product.
A practical odor-first checklist
Before adding anything, identify the problem. If measuring detergent is the sticking point, the detergent format guide explains which formats let you adjust the dose. For stain-remover choices beyond baking soda, use our stain-remover selection guide.
- Is the item fully dry? Damp storage can create an odor that returns until the storage problem changes.
- Is the washer itself clean and draining? A neglected gasket, filter, or drum can transfer odor.
- Was too much detergent used? Residue can trap soil and fragrance.
- Is the load packed too tightly? Water and detergent need room to circulate.
- Does the care label allow the planned wash? Delicate items may need a different service.
Fixing the source is more useful than repeatedly masking it. If ordinary household laundry has become a recurring backlog, weekly wash and fold can make the process repeatable. Add accurate care notes rather than requesting an unverified home remedy.
When to stop experimenting
Stop and ask for help when the item is valuable, the fiber is unknown, the stain involves an unfamiliar chemical, or the odor may come from contamination that needs special handling. Do not put a potentially hazardous item in an ordinary laundry bag.
Freshly Folded requires contact before pickup for potentially contaminated items so the team can confirm acceptance and applicable handling. For ordinary washable laundry, you can schedule a pickup and record detergent and drying preferences.
For repeat scheduling on a phone, download the Freshly Folded app for iPhone or the Android app.
Keep the care notes, lose the laundry pile
Book household wash and fold and add the instructions that matter for your load.
Frequently Asked Questions
Can I put baking soda directly in the washing machine?
Some appliance guidance allows baking soda in the empty washer tub, but you should check your washer manual first. Do not put it in a detergent or softener dispenser unless the manufacturer specifically directs that use.
How much baking soda should I add to laundry?
Maytag gives an example of up to one-half cup, but washer size, load, and manufacturer directions differ. Treat that as product guidance for compatible machines, not a universal dose.
Can baking soda replace laundry detergent?
No. Baking soda is not a complete detergent and does not replace the surfactants and other ingredients used to remove and suspend soil.
Can I use baking soda on wool or silk?
Use extra caution and generally avoid it unless the garment and product instructions explicitly allow it. Alkalinity and agitation can be unsuitable for wool, silk, cashmere, and other delicate fibers.
Should I mix baking soda and vinegar in laundry?
The acid and base react and neutralize much of each other. Use a manufacturer-approved ingredient for one defined task rather than combining them for the fizz.
Does baking soda sanitize laundry?
Do not rely on baking soda to sanitize or disinfect laundry. When disinfection is required, follow a suitable labeled product and the garment and appliance instructions.
