How to clean a toilet with a homemade cleaner

Three extension-backed homemade toilet methods exist, and all of them pair vinegar with a powder: borax and vinegar left for 2 hours (NMSU), borax sprinkled and sprayed with vinegar and left for several hours or overnight (University of Georgia, also on the Kentucky and Missouri cards), and baking soda followed by vinegar for 15 minutes (a Penn State IPM handout). Each is printed below as published. They clean rings and stains; none of them kills germs, and none of their sources says so. The toilet is also the place in a house where acid and bleach most often meet, so this page explains why that happens and when to reach for a registered disinfectant instead.

Three published methods compared

The Georgia card also appears in Kentucky's 2010 set and Missouri's GH201 [4][5], so the three amount to a single source.

Each method in its source's words

NMSU, Toilet Cleaners (G-313, revised February 2019) [1]:

Use borax and vinegar: - Pour 1 cup vinegar all over the stained area of the toilet. - Sprinkle 1 cup borax over the vinegar. - Allow to soak for 2 hours. - Use a toilet brush to clean. - Flush.

University of Georgia, Toilet Bowl Cleaner (revised October 2018) [2]:

- 1 cup borax - ½ cup white vinegar Flush to wet the sides of the bowl. Sprinkle the borax around the toilet bowl, then spray with vinegar. Leave for several hours or overnight before scrubbing with a toilet brush.

Pennsylvania IPM Program, Toilet Bowl Cleaner [3]:

- 1/4 to 1/2 cup of white vinegar (undiluted) - Baking Soda Sprinkle sides of toilet bowl with baking soda and allow to stand for a few minutes. Pour in vinegar and let stand for 15 minutes (the combination will fizz and bubble.) Scrub with toilet brush and flush.

Choosing between them

• For a ring or hard-water stain above the waterline, the Georgia method suits it: the card says to "Flush to wet the sides of the bowl" before the borax goes on, and allows several hours or overnight on the stain [2].
• For a ring at or below the waterline, the NMSU method pours vinegar directly "all over the stained area" [1] and leaves it 2 hours.
• For a quick routine clean, the Penn State method is the shortest. Its fizz is baking soda and vinegar reacting to sodium acetate, water and carbon dioxide [6], which uses up both, so the bubbling shows the reaction running its course. Most of the work is the brush.

All three are acid-plus-powder methods for rings and stains. Where a ring is mineral, it comes from the same source as faucet scale: the U.S. Geological Survey notes that hard water leaves mineral buildup in plumbing and fixtures [7].

Borax in the bowl, with children and pets around

The two borax methods leave a cup of borax in an open bowl for 2 hours to overnight [1][2]. Close the lid while it soaks, keep small children and pets out of the room, and flush before anyone uses the toilet. Borax explains how US and EU agencies classify it and what to do if a child swallows some; for any swallowing, NMSU prints Poison Control's number, 1-800-222-1222 [1].

Why the toilet is where acid and bleach meet

Most homes keep more than one product for the toilet, often a bowl cleaner and a bottle of bleach, and NMSU's safety cautions single out that pairing: "NEVER mix chlorine bleach with commercial toilet bowl cleaners" [1]. CDC's rule is broader: "Never mix household bleach (or any disinfectants) with any other cleaners or disinfectants" [8]. Texas A&M AgriLife Extension says the same: "Never mix household bleach with ammonia or any other cleanser" [9].

The homemade methods above put vinegar, an acid, in the bowl, so the same rule applies to them. The mistakes that cause trouble are ordinary ones:

1. Pouring bleach into a bowl that still holds a vinegar soak or an acid cleaner.
2. Clipping a bleach tablet into a tank while using an acid cleaner in the bowl.
3. Adding bleach to a bowl that has not been flushed after use. Stale urine smells of ammonia; no agency source has measured what bleach does with it, but bleach and ammonia explains why the smell alone is reason to flush first.

Use one product at a time, flush between products, and open a window. If you have already mixed products and the air smells sharp, leave the room and call Poison Control; I mixed cleaners by accident gives the steps. Bleach and vinegar explains the chemistry and lists the acid products people do not recognize as acids.

When you need to disinfect a toilet

None of these three recipes is a disinfectant. EPA treats "Sanitizes, disinfects or sterilizes" as a pesticidal claim that requires registration [10], and minimum risk (25(b)) products may not claim to sterilize, disinfect, sanitize or kill germs [11]. When someone in the house has a stomach illness, or after a spill of body fluids, clean the toilet first, flush, and then use a product with an EPA registration number on its label, following its directions and contact time. UF/IFAS prints a bleach solution for toilets with its own figure [12]; CDC's dilution is the one followed, set out on making a bleach disinfecting solution. When you actually need to disinfect covers when that step is worth it.

Finishing the bathroom floor

With the bowl done, the floor around it is usually next, and the published floor dilutions depend on what the floor is made of. Floor cleaners by floor type sets them out.

References

1. 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
2. University of Georgia Cooperative Extension (Pamela R. Turner and Sharon M. S. Gibson), *Green Cleaning: Recipes for a Healthy Home*, HACE-E-73-1 (Green Clean Booklet), revised October 2018. https://site.extension.uga.edu/greenway/files/2024/09/10.18_Green-Clean-Booklet_update.pdf
3. Pennsylvania Integrated Pest Management Program (Penn State), *Greener Cleaner Recipes*, undated handout hosted by Texas A&M AgriLife Extension Entomology. https://extensionentomology.tamu.edu/wp-content/uploads/sites/8/2011/05/Green-cleaning.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. University of Missouri Extension (Pamela R. Turner and Sharon M. S. Gibson, adapted by Kandace Fisher-McLean), *Green Cleaning: Recipes for a Healthy Home*, GH201, 2019 (GH-0201-2019 in the MU MOspace record), adaptation of the 2015 UGA edition. https://extension.missouri.edu/media/wysiwyg/Extensiondata/Pub/pdf/hesguide/foodnut/gh201.pdf
6. Science Notes (Anne Helmenstine), *Chemical Equation for Baking Soda and Vinegar Reaction*, updated August 26, 2023. https://sciencenotes.org/chemical-equation-for-baking-soda-and-vinegar-reaction/
7. U.S. Geological Survey, *Hardness of Water*, August 24, 2026. https://www.usgs.gov/water-science-school/science/hardness-water
8. Centers for Disease Control and Prevention, *Cleaning and Disinfecting with Bleach*, reviewed April 24, 2024. https://www.cdc.gov/hygiene/about/cleaning-and-disinfecting-with-bleach.html
9. Texas A&M AgriLife Extension, Dinner Tonight, *DIY Bleach Solutions*, March 18, 2020. https://dinnertonight.tamu.edu/diy-bleach-solutions/
10. U.S. Environmental Protection Agency, *Determining If a Cleaning Product Is a Pesticide Under FIFRA*, updated July 6, 2026. https://www.epa.gov/pesticide-registration/determining-if-cleaning-product-pesticide-under-fifra
11. U.S. Environmental Protection Agency, *Conditions for Minimum Risk Pesticides*, updated August 31, 2026. https://www.epa.gov/node/64449
12. UF/IFAS Extension (Amanda Griffin and Randall A. Cantrell), *Homemade Household Cleaners*, FCS3319, Release Date October 7, 2025. https://ask.ifas.ufl.edu/publication/FY1449