What is the difference between cleaning, sanitizing and disinfecting?
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Cleaning removes dirt, grease and many germs from a surface with soap or detergent, water and scrubbing. Sanitizing uses a chemical to kill bacteria down to a level public health codes treat as safe. Disinfecting uses a chemical to kill bacteria and viruses on a surface, and it is tested to a stricter standard than sanitizing. That is how the U.S. Environmental Protection Agency (EPA) separates the three [1][2]. The difference matters because the last two are legal claims that only an EPA-registered product can make. This page explains each step, why cleaning always comes first, and where a homemade cleaner fits.
The three words side by side
EPA regulates any product that claims to kill germs on surfaces, and its definitions are the ones that count on a label. CDC (the Centers for Disease Control and Prevention) uses the same three steps in its household advice [3].
| Cleaning | Sanitizing | Disinfecting | |
|---|---|---|---|
| What it does (EPA) | "removes dirt and organic matter from surfaces using soap or detergents" [1] | "kills bacteria on surfaces using chemicals. It is not intended to kill viruses." [1] | "kills viruses and bacteria on surfaces using chemicals" [1] |
| Longer EPA definition | Not a pesticide when no germ claim is made [4] | Reduces, "but not necessarily eliminate[s]," microorganisms to levels "considered safe as determined by public health codes or regulations" [2] | Destroys or "irreversibly inactivate[s]" infectious fungi and bacteria on nonliving surfaces, "but not necessarily their spores" [2] |
| Who can make the claim | Any product | EPA-registered sanitizers only | EPA-registered disinfectants only |
| What you see on the label | Directions for cleaning | An EPA Reg. No. and sanitizing directions with a contact time | An EPA Reg. No., the organisms it was tested against, and a contact time for each |
Above disinfectants sits a third registered category, sterilants, which destroy bacterial and fungal spores as well. They are used mainly in hospitals and have no ordinary household use [2].
Why cleaning has to come first
CDC tells households to clean a surface before sanitizing or disinfecting it, because dirt can make those chemicals less effective [3]. EPA's own steps for using a disinfectant say the same: wash the surface with soap and water first if the directions call for it or if the surface is visibly dirty [5].
There is a second reason. CDC says that in most situations cleaning alone, with soap and water, removes most germs from surfaces, and that sanitizing or disinfecting at home is likely not needed unless someone in the house is sick [6]. So cleaning is the step you do every time, and the chemical step is the one you add when there is a reason. When that reason applies is set out in when you actually need to disinfect.
A practical way to hold the order in your head:
- Clean. Detergent or soap, water, and friction. This lifts grease, crumbs, film and a large share of the germs with them.
- Rinse if the product or the surface calls for it.
- Sanitize or disinfect only when the situation calls for it, with a registered product used exactly as its label says, including the time the surface must stay wet. That waiting period is called contact time (or dwell time) and has its own page: contact time.
What sanitizer and disinfectant mean on a label
A label that says "sanitizes" or "disinfects" is making a pesticidal claim under federal law. EPA lists "sanitizes, disinfects or sterilizes" among the claims that make a cleaning product a pesticide that must be registered [4]. Before a disinfectant claim can go on a label, the company has to submit efficacy data to EPA for review [7]. The label you read in the store is the result of that review: it names the organisms the product was tested against, the surfaces it was tested on, and how long it must stay wet.
Two consequences follow for you at home:
- A sanitizer is not a weaker disinfectant you can use for everything. EPA's definition says a sanitizer is not intended to kill viruses [1]. If you need to deal with a virus, a sanitizer label is the wrong one.
- Only the label tells you what a product does. Two bottles with similar names can carry different claims. The registration number and the directions are what to read. Choosing and reading a registered disinfectant walks through a label section by section.
Bleach is a special case because it is sold as both a cleaner and a registered disinfectant, and CDC publishes a home dilution for it. That figure lives on one page, making a bleach disinfecting solution.
Where a homemade cleaner fits
A homemade mix of vinegar, baking soda, soap or essential oils can clean. It can lift grease, cut hard-water film and leave a surface looking and smelling clean. What it cannot be called is a sanitizer or a disinfectant. EPA says it "does not review effectiveness of common household ingredients like vinegar or rubbing alcohol," so it "cannot verify how well they work" against germs [8]. Without that review there is no tested contact time, no list of organisms and no registration, which are the things that make the words mean something.
The same line applies if you ever sell a cleaner. A homemade or "natural" product described as killing germs is making a pesticidal claim [4]. Minimum risk products under FIFRA section 25(b), the exemption many natural sellers assume covers them, may not claim to control any microorganism, so 25(b) does not cover germ claims [9]. The full rule is on minimum risk (25(b)) products, and what makes a claim pesticidal is on what makes a cleaning product a pesticide.
If you were hoping a pantry ingredient could stand in for a disinfectant, the evidence is on does vinegar disinfect?, hydrogen peroxide and alcohol as disinfectants and do essential oils kill germs?.
Deciding whether today calls for more than cleaning
Most days, cleaning is the whole job. The next question is when it is not: illness in the house, someone with a weakened immune system, or raw meat juices on the counter. Those cases, and CDC's advice for each, are on when you actually need to disinfect.
References
- U.S. EPA, What's the difference between products that disinfect, sanitize, and clean surfaces?, last updated October 8, 2026. https://www.epa.gov/coronavirus/whats-difference-between-products-disinfect-sanitize-and-clean-surfaces
- U.S. EPA, What Are Antimicrobial Pesticides?, last updated January 29, 2026. https://www.epa.gov/pesticide-registration/what-are-antimicrobial-pesticides
- CDC, Cleaning and Disinfecting, last updated June 3, 2025. https://www.cdc.gov/hygiene/cleaning-disinfecting/index.html
- U.S. EPA, Determining If a Cleaning Product Is a Pesticide Under FIFRA, last updated July 6, 2026. https://www.epa.gov/pesticide-registration/determining-if-cleaning-product-pesticide-under-fifra
- U.S. EPA, 6 Steps for Safe and Effective Disinfectant Use, one-page sheet, posted April 2020. https://www.epa.gov/sites/production/files/2020-04/documents/disinfectants-onepager.pdf
- CDC, When and How to Clean and Disinfect Your Home, last reviewed January 31, 2025. https://www.cdc.gov/hygiene/about/when-and-how-to-clean-and-disinfect-your-home.html
- U.S. EPA, Efficacy Requirements for Antimicrobial Pesticides, last updated September 29, 2026. https://www.epa.gov/pesticide-registration/efficacy-requirements-antimicrobial-pesticides
- U.S. EPA, Can I use common household substances to kill the novel coronavirus?, last updated July 28, 2026. https://www.epa.gov/coronavirus-and-disinfectants/can-i-use-common-household-substances-kill-novel-coronavirus
- U.S. EPA, Conditions for Minimum Risk Pesticides, last updated August 31, 2026. https://www.epa.gov/node/64449
