How long does a homemade cleaner keep?

There is no tested answer. No extension service, agency or study reviewed here gives a tested shelf life for a homemade water-based cleaner, so any number of weeks you read elsewhere is a guess. What the sources do give is advice: UF/IFAS says "It is best to mix just what you need and use it all," and the few recipes that mention keeping at all give one-off statements, from NMSU's furniture polish that "will keep several weeks" in the refrigerator to UGA's polish that "will keep for a year." This page collects every published statement, explains why a tested figure is missing, and shows how to work without one.

Every storage statement the extension recipes make

Two things in that table are worth seeing clearly. First, Kentucky's card is an adaptation of Georgia's, and the two give opposite advice for a furniture polish: one says make it fresh each time, the other says it keeps a year [3][4]. Neither cites a test. Second, NMSU's "several weeks" comes with its own signs of spoilage, rancid smell and mold, which tells you what its authors expected to go wrong [2]. The recipes themselves are on wood furniture polish.

Why no one gives a tested number

A shelf life is a measured result: you make a batch, store it in its real container at known temperatures, and check it at intervals until it stops doing its job or starts growing something. Commercial makers run that work for products they sell, and shelf life for products you sell describes it. For a homemade mix, three things stand in the way:

1. The ingredients vary. Your vinegar, soap, tap water and essential oil are not the author's. The result of a test on one would not transfer to the next kitchen.
2. Water-based mixes are unpreserved. Water-based cleaners made for sale usually carry preservatives to stop bacteria and mold growing in the bottle. A homemade spray of soap and water has none. Preservatives explains what they do and why adding one turns into a business decision.
3. Some ingredients break down on their own. Diluted bleach loses strength in hours to weeks depending on the container, and peroxide decomposes to water and oxygen. Those two have data, on does bleach expire? and hydrogen peroxide after opening. The pantry mixes do not.

So when a blog says a homemade all-purpose spray "lasts about a month," ask what it was tested against. The sources reviewed here give no such figure, and this page does not estimate one.

Mix by type: what you can and cannot say

Signs a mix has gone off

None of these is a test, and a mix can lose its cleaning power without showing any of them. Throw it out if you see:

• Mold or a rancid smell. NMSU's own discard signs for its polish [2].
• Cloudiness, slime or floating specks in a mix that was clear.
• A sour or musty smell that was not there when you made it.
• Separation that will not shake back together.
• A bulging or paneled bottle, which means gas is building up.

Cloudiness, smell and growth explains what those changes mean in a product made for sale.

Working without a number

The practical answer follows UF/IFAS: small batches you will use soon [1]. In practice:

1. Make one bottle at a time, sized to what you will use soon, not a gallon to last the season.
2. Write the date on the label next to the contents and the never-mix warning, as bottles and labels sets out.
3. Wash and dry the bottle between batches. Do not top up an old mix with a new one.
4. Keep it cool and out of sunlight, as UGA and Kentucky say for their kitchen cleanser [3][4].
5. When in doubt, pour it out and mix fresh; getting rid of old cleaners covers how.

None of these steps gives the mix a shelf life. They make it likely you finish the bottle before the question arises.

Where the bottles live between uses

Storage affects every one of these mixes. Heat, light and a bottle stored next to the wrong cleaner cause more trouble than age. Storing cleaners at home covers where to keep them and what to keep apart.

References

1. University of Florida IFAS Extension (Amanda Griffin and Randall A. Cantrell), *Homemade Household Cleaners*, FCS3319, Release Date October 7, 2025. https://ask.ifas.ufl.edu/publication/FY1449
2. New Mexico State University Cooperative Extension Service (revised by Rick Griffiths and Sonja Koukel), *Green Alternatives to Toxic Household Products and Hazardous Waste*, G-313, revised February 2019. https://pubs.nmsu.edu/_g/G313/index.html
3. University of Georgia Cooperative Extension (Pamela R. Turner and Sharon M. S. Gibson), *Green Cleaning: Recipes for a Healthy Home*, HACE-E-73-1, revised October 2018. https://site.extension.uga.edu/greenway/files/2024/09/10.18_Green-Clean-Booklet_update.pdf
4. University of Kentucky Cooperative Extension (Connee Wheeler, adapted from Gibson and Turner, UGA), *Green Cleaning: Recipes for a Healthy Home*, HHF-CRW.175, January 2010. https://fcs.mgcafe.uky.edu/sites/fcs.mgcafe.uky.edu/files/green-cleaning-recipe-cards.pdf
5. Centers for Disease Control and Prevention, *Cleaning and Disinfecting with Bleach*, last reviewed April 24, 2024. https://www.cdc.gov/hygiene/about/cleaning-and-disinfecting-with-bleach.html