A dishwasher sanitize cycle raises the temperature of the final rinse so the machine can reduce bacteria on your dishes far more than a normal wash does. On a dishwasher certified to the NSF/ANSI 184 standard, that means at least a 99.999% bacterial reduction and a 150°F final rinse when you run the sanitizing cycle. It adds time, it only counts when the cycle finishes, and most weeknight loads do not need it. Here is how it works, what to load, and when it earns its extra minutes.
TL;DR
- Yes, a certified sanitize cycle sanitizes dishes: it heats the final rinse to about 150°F and is designed to cut bacteria by 99.999%. Ordinary cycles should not be assumed to do the same.
- Expect a longer run. One major manufacturer says the option may add up to 60 minutes, depending on how cold your incoming water is.
- Use it selectively: baby bottles, cutting boards, items touched by raw meat, or a household member who is sick. Everyday plates and utensils rarely need it.
- Load only dishwasher-safe, heat-tolerant items, and wait for the “Sanitized” light or message to confirm the cycle completed.
Table of Contents
- What the sanitize cycle actually does
- Does a dishwasher sanitize dishes without that setting?
- Should you run the sanitize cycle?
- How long the sanitize cycle takes
- How to know the cycle worked
- What to put in the dishwasher for a sanitize cycle
- Does the sanitize cycle use more energy?
- Sanitizing things beyond dishes
- Perspective: Our view on the sanitize cycle
- Choosing a dishwasher with a sanitize option
- Find a dishwasher that fits your routine
- Troubleshooting: when the sanitize cycle does not seem to work
- FAQ
- Sources
What the sanitize cycle actually does
A normal dishwasher cycle cleans: detergent, spray arms and hot water lift food soil off plates. Sanitizing is a different goal. It aims to reduce the bacteria that remain after cleaning to a very low level, and it does that with heat.
During a sanitize cycle, the dishwasher keeps heating the water until the final rinse reaches the target temperature. GE explains that its certified residential cycle uses a high-temperature rinse and runs until the water reaches approximately 150°F. Many machines have an internal heating element that does this work, which is why the option is often paired with a heated dry setting.
The word “sanitize” has a specific meaning here. It is not the same as sterilizing, which removes every living organism. A sanitizing cycle reduces bacteria by a measured percentage, which is why the label reads 99.999% rather than 100%.
The standard behind the label
The claim on the control panel is not just marketing language. NSF/ANSI 184 is the standard that sets minimum public-health and sanitation requirements for residential dishwashing equipment. NSF adds that a certified dishwasher can be verified to sanitize glassware, dishes and cookware, and that the standard also covers minimum design and cleaning-effectiveness requirements.
Two details matter in practice:
- The certification applies to the sanitizing cycle. NSF says performance is verified only when the machine runs on that cycle, so you should not assume a normal or eco cycle meets the same claim.
- Residential is not commercial. GE notes that its certified residential models do not meet NSF commercial standards and are not intended for licensed food establishments. A home dishwasher is built for a household, not a restaurant kitchen.
What it is called on your machine
Brands use different names for the same idea: Sanitize, Sani Wash, Sanitization, Anti-Bacteria, or a Sanitize option you add on top of another cycle. GE lists several of these names for the same feature. Check your manual to see whether yours is a standalone cycle or a modifier you press before starting a normal wash.
Does a dishwasher sanitize dishes without that setting?
Not reliably. A dishwasher on a normal cycle uses hot water and detergent, and that does a good job of cleaning. But the sanitizing result is tied to reaching the final-rinse temperature the standard requires. If your machine did not run its sanitizing cycle, you have clean dishes, not dishes you can assume meet the 99.999% target.
That is not a problem for most loads. Dishwashing already beats a quick rinse by a wide margin: the water is hotter than most hands can tolerate, the detergent is formulated for the job, and the heated dry step finishes it. The sanitize cycle is a step up for situations where the extra reduction in bacteria matters.
The CDC’s guidance on infant feeding items makes this concrete. It says that if you use a dishwasher with hot water and a heated drying cycle or a sanitizing setting, a separate sanitizing step is not necessary for baby bottles and similar items. For a dishwasher-safe bottle, the machine can do the sanitizing job for you.
Should you run the sanitize cycle?
The honest answer: sometimes, not every time. Virginia Tech’s Melissa S. Wright points out that most plates and utensils are not porous and do not necessarily need sanitizing after every use. That supports a selective approach: save the longer cycle for loads where it counts, and run your usual cycle the rest of the time.
Good times to use it
| Situation | Why sanitize helps |
|---|---|
| Baby bottles, nipples and pacifier parts | The final-rinse heat reduces bacteria on items used by infants |
| Plastic or wooden-free cutting boards that touched raw meat, poultry or fish | Raw proteins leave bacteria in knife grooves |
| Dishes after someone in the home has been sick | Extra reduction in germs on shared plates, cups and utensils |
| Items used for a person with a weakened immune system | A higher final-rinse temperature adds a margin of safety |
| Reusable water bottles, sippy cups and lunch containers | They stay damp and are handled mouth-to-lid every day |
| Pet bowls (if your household washes them in the dishwasher) | Animal saliva and food residue build up quickly |
When a normal cycle is enough
- Plates, bowls and flatware from ordinary meals
- Glasses and mugs used by healthy adults
- Pots and pans with cooked-on food, where a heavy or pots-and-pans cycle does the real work
- Any load where you simply want dishes clean and dry
If you are unsure which cycle matches which kind of load, our guide to how dishwasher cycles compare walks through soil level, energy use and what each setting is built for.
A practical routine
Most households do well with a simple pattern. Run your standard auto or normal cycle for daily dishes. Keep a small “sanitize load” in mind: when bottles, a cutting board and a few kids’ cups pile up, group them together and run the sanitize option once. You get the benefit without lengthening every wash.
How long the sanitize cycle takes
Expect a longer run than a normal wash. Whirlpool says sanitize settings can add up to 1.5 hours, while GE says its sanitize option may add up to 60 minutes. The range exists because the added time depends on the machine and on your water.
The key variable is incoming water temperature. The dishwasher has to heat the water enough to reach the sanitizing target, so colder water going in means more heating time. GE notes that cycle length will vary depending on the temperature of the water going into the dishwasher. In a very cold-water situation, the target may not be met at all.
Ways to help the cycle finish
- Run the hot tap at the sink first until the water turns hot, then start the dishwasher. This sends warmer water into the first fill.
- Avoid running the sanitize cycle right after a big load of laundry or a long shower if your household shares a small water heater.
- Do not open the door mid-cycle. An interruption can stop the sanitizing conditions from being reached.
- Use the delayed start to run the longer cycle overnight, so the extra time costs you nothing.
If you want the numbers for other settings to compare, see our breakdown of average dishwasher cycle time by cycle type.
How to know the cycle worked
Selecting sanitize is not enough. The cycle has to finish and reach the required temperature. GE explains that a completed sanitizing cycle is indicated by a Sanitized light or a Cycle Sanitized message on the display, and that if the cycle is interrupted or the incoming water is too cold, the indicator may not appear because sanitizing conditions may not have been met.
In practice:
- Check the display before you unload. If the light or message is there, the cycle completed as designed.
- If it is missing, treat the load as washed but not confirmed sanitized. For bottles and cutting boards, run the cycle again with hotter incoming water, or use another method your manual or health guidance recommends.
- Heated dry matters on some models. GE says that when Heated Dry is used, the dry cycle runs and then the indicator displays. Without it, there is a short cool-down period first. Your own manual will tell you how your model behaves.
The indicator is also useful as a habit signal. Once you know what a finished sanitize cycle looks like on your display, you will quickly spot a run that did not complete.
What to put in the dishwasher for a sanitize cycle
Detergent and rinse aid
You do not need anything special beyond your usual dishwasher detergent. Samsung’s guidance is to use dishwasher detergent for all cycles except Rinse Only, and it notes that rinse aid can improve drying performance. That second point is useful on a sanitize load, because the longer, hotter cycle leaves plastics and glassware wet if the dry step is short. If you have spots or cloudy glasses, our piece on using rinse aid at home explains how to fix them without switching detergent.
Do not add bleach or other cleaners to the machine unless your manual says to. Hot water plus detergent is what the cycle is built around.
Items that suit the cycle
NSF says dishwashers can be certified to sanitize glassware, dishes and cookware. In real life, the best candidates are things that are dishwasher-safe and tolerate heat well:
- Glass and ceramic dishes
- Stainless steel flatware, pots and bowls
- Dishwasher-safe baby bottles and parts (in a closed-top basket or mesh bag so small pieces do not fall into the filter, as the CDC advises)
- Dense, dishwasher-safe plastic cutting boards
- Reusable food containers and lids that are labeled top-rack safe
Items to keep out
Bosch’s guidance on the sanitize option says to use it only for items labeled dishwasher-safe and heat-tolerant, and to avoid wood, wood-handled utensils, thin plastics that warp, and items with glued or bonded parts, while following the item and dishwasher manuals. A few examples:
- Wooden spoons, wooden boards and wood-handled knives
- Thin or lightweight plastic containers that can warp
- Cast iron and carbon steel pans, which are better washed by hand
- Anything with glued parts, such as some travel mugs and older knife handles
Wood versus plastic is a common question for cutting boards. If you are choosing between the two, our guide to wooden versus plastic cutting boards covers the tradeoffs, including which kind can go in the dishwasher.
Loading tips that make a difference
- Scrape, do not pre-wash. Remove large scraps, but leave a light film of soil for the detergent to work on.
- Face dirty surfaces toward the spray arms and keep bowls tilted so water does not pool.
- Do not overload. Water has to reach every surface for the heat and detergent to do their jobs.
- Keep small items contained. Use a closed basket or mesh bag for nipples, valves and small lids.
- Separate sanitize-worthy items (bottles, cutting boards) from heavily soiled pots so the cycle matches the load.
If your home setup makes this hard, our guide to building a better dishwashing setup at home covers storage, racks and routine.
Does the sanitize cycle use more energy?
Yes, in the sense that heating water to a higher temperature takes energy and the cycle runs longer. The cost per load is modest, and it makes sense to spend it where it counts. This is the main reason a selective approach works better than leaving sanitize on permanently.
Some ways to keep the tradeoff small:
- Run full loads rather than half-loads.
- Use the sanitize option for the few loads that need it.
- Use a delayed start so the extra time does not interrupt your evening.
- Keep your water heater at a setting your household finds comfortable and safe, and follow the manufacturer’s manual.
For a deeper look at matching the cycle to the mess, see our dishwasher cycles guide for homeowners.
Sanitizing things beyond dishes
People often ask whether the cycle is useful for gear that is not tableware. A few ideas, always subject to the item’s own care label:
- Coffee gear. Removable parts like carafes and dishwasher-safe filter baskets can often go in the top rack. For the rest of the setup, this walkthrough on cleaning coffee equipment step by step is a handy companion to what the dishwasher can handle.
- Blender jars and lids. Many are top-rack safe, but check the base, blade assembly and gasket instructions. If your blender is giving you trouble, see our quick fixes for a blender that spins but won’t blend.
- Kids’ items. Sippy cups, straws with removable parts and lunch boxes tolerate the cycle if they are labeled dishwasher-safe.
When in doubt, read the label. A warped lid or a cracked handle is a worse outcome than a skipped sanitize run.
Perspective: Our view on the sanitize cycle
We treat the sanitize cycle as a tool, not a default. In the kitchens we write about, most loads are everyday plates, glasses and pans, and a good normal cycle handles them well. The sanitize option earns its place for the loads that matter most: bottles, cutting boards, and the week someone in the house is sick.
That is also why we pay attention to how a dishwasher is built, not just what the panel says. A machine with a clear sanitize indicator, a reliable heated dry option and racks that hold bottles and boards securely makes the right habit easier. When the feature is simple to use, people actually use it when it counts.
For busy families, our advice is to think in loads. Group the sanitize-worthy items, run the cycle overnight with a delayed start, and check for the confirmation light in the morning. For small kitchens and apartments, a compact or countertop model can fit this routine too, as long as you check what cycles it offers before you buy.
Our approach to curating dishwashers and kitchen gear is built around that kind of everyday usefulness: features you will really use, set up so that cleaning is less of a chore.
K. Connors
Choosing a dishwasher with a sanitize option
If you are shopping, a sanitize cycle is one feature among several. Look for these when you compare models:
- A sanitize cycle or option. Check the manual or listing for the exact name and whether it is NSF/ANSI 184 certified, since that certification is what verifies the performance claim for residential machines.
- A completion indicator. A light or message that tells you the cycle finished sanitizing is far more useful than guessing.
- Heated dry. It helps plastics and bottles dry, and on some models it is part of how the cycle completes.
- Rack flexibility. Adjustable tines and a top rack that holds bottles and boards make the cycle more useful.
- Size and fit. Standard, compact and countertop machines all exist. If your space is tight, check clearances early with our guide to compact dishwasher dimensions.
- Control style. Top controls and front controls differ in how they look and where you reach to start a cycle. Our comparison of top control versus front control dishwashers explains the difference.
Renters and small-space households can also read our roundup of the best countertop dishwashers for apartments before deciding what suits them.
Find a dishwasher that fits your routine
If you are ready to upgrade, we gather dishwashers on one page so you can compare styles and sizes side by side before you head to a retailer. Our dishwasher collection is a good starting point, whether you want a built-in model for a kitchen remodel or a compact unit for a small space.
When you compare models, open each listing’s specifications and look for the sanitize cycle and its indicator. If you are pairing a new dishwasher with new dishes, our tableware and dining sets page covers pieces that suit everyday family use. Always confirm that a given piece is dishwasher-safe on its label.
Troubleshooting: when the sanitize cycle does not seem to work
The Sanitized light never appears
The most common causes are an interrupted cycle and water that is too cold. GE says the indicator may not appear if the cycle is interrupted or the incoming water is too cold, because the sanitizing conditions may not have been met. Try these steps:
- Run the hot tap at the sink until it is hot, then start the cycle again.
- Avoid opening the door or pressing Cancel during the run.
- Check that the load is not blocking the spray arms.
- Consult your manual for the exact indicator behavior on your model, including whether it needs Heated Dry.
If the light still does not appear after these checks, contact the manufacturer’s support or a qualified appliance technician. A heating element or sensor fault is not a do-it-yourself repair.
Dishes come out wet or spotted
Longer hot cycles can leave plastics wet. Rinse aid helps, as Samsung’s guidance notes, and a heated dry option helps further. Loading plastics on the top rack, angled so water runs off, also makes a difference.
Plastics look warped or cloudy
Thin plastics are not built for high heat. Move them to the top rack on a normal cycle, or wash them by hand, and keep the sanitize cycle for sturdier items. Follow the care label on each piece.
The cycle takes much longer than expected
That is normal on a cold-water day. Plan the cycle for overnight with a delayed start, and see our cycle time comparison to understand how it stacks up against other settings.
FAQ
Does a dishwasher sanitize dishes?
A dishwasher certified to NSF/ANSI 184 can sanitize dishes when it runs its sanitizing cycle, reaching a 150°F final rinse and a 99.999% bacterial reduction. NSF says the claim is verified only on that cycle, so do not assume a normal cycle meets it. Normal cycles still clean dishes well for everyday use.
Should I run the sanitize cycle every time?
No. Most plates and utensils are nonporous and do not need sanitizing after every use, according to Virginia Tech’s Melissa S. Wright. Save the cycle for baby bottles, cutting boards that touched raw meat, and loads after illness in the home.
How long does the sanitize cycle take?
It depends on your machine and your water. GE says the option may add up to 60 minutes, and Whirlpool says sanitize settings can add up to 1.5 hours. Colder incoming water means a longer cycle, so a delayed start overnight is a practical way to use it.
What can I put in the dishwasher for a sanitize cycle?
Only items labeled dishwasher-safe and heat-tolerant, such as glass, ceramic, stainless steel and sturdy plastics. Keep out wood, wood-handled utensils, thin plastics that can warp and anything with glued parts. Use your regular dishwasher detergent, and add rinse aid if you want better drying.
How do I know the sanitize cycle finished properly?
Look for the Sanitized light or Cycle Sanitized message on your display. GE says it may not appear if the cycle was interrupted or the incoming water was too cold. If it is missing, treat the load as washed but not confirmed sanitized.
Sources
- Dishwasher Certification, NSF
- NSF/ANSI 184 – 2019 preview, ANSI Webstore
- Dishwasher – Sanitization Cycle, GE Appliances
- How to Clean, Sanitize, and Store Infant Feeding Items FAQ, CDC
- Dishwasher vs. handwashing and sanitizing dishes, Verywell Health
- Dishwasher sanitize option tips and limits, Bosch
- How to use dishwasher detergent and rinse aid, Samsung
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