How to Clean a Dishwasher: Simple Step-by-Step Guide
Learn how to clean a dishwasher the easy way: rinse the filter, run a vinegar cycle, then baking soda, and keep it fresh with simple monthly habits.
By Lara Holm
·Staff Writer ·
·
7 min read
To clean a dishwasher, empty it, remove and rinse the filter, wipe the door seal and edges, clear the spray arm holes, then run a hot empty cycle with a cup of white vinegar or a dishwasher cleaner. Regular cleaning keeps dishes coming out spotless, prevents odors, and helps the appliance last longer. The process is straightforward and takes only a few minutes of hands-on effort.
Why does a dishwasher need cleaning?
It seems odd that a machine designed to wash things needs washing itself, but food particles, grease, soap scum, and hard-water minerals gradually build up inside. These deposits collect in the filter, along the rubber door seal, and in the small holes of the spray arms. Over time they can cause bad smells, leave dishes cloudy or gritty, and reduce how well the machine drains and sprays.
Routine cleaning solves most of these problems before they start. It also protects your investment, since a well-maintained dishwasher tends to run more efficiently and reliably.
There is also a hygiene angle. A machine that traps old food and stays damp between cycles can develop a musty smell and, in some cases, mold or mildew around the seal. None of this means the appliance is broken; it simply reflects normal use. A little regular attention keeps the interior fresh and stops small issues from turning into stubborn ones that are harder to reverse later.
What will you need?
You do not need special equipment. A few common household items cover almost every step.
- A soft brush or old toothbrush
- A cloth or sponge
- White vinegar or a commercial dishwasher cleaner
- Warm water
- A toothpick or thin wire for spray arm holes
Important safety note: never mix cleaning chemicals. In particular, do not combine bleach with vinegar or other acids, because the reaction can release harmful fumes. Use one product at a time and ventilate the room if needed.
How do you clean a dishwasher step by step?
Work from the inside out so debris does not settle on parts you have already cleaned. The following order keeps things simple.
- Empty it: remove all dishes and racks if they slide out easily.
- Clean the filter: twist or lift out the filter at the bottom, rinse it under warm water, and brush away stuck debris.
- Clear the spray arms: check the small holes and poke out any blockages with a toothpick.
- Wipe the seal and edges: clean the rubber gasket around the door and the bottom lip where crumbs collect.
- Run a cleaning cycle: place a cup of white vinegar upright on the top rack, or add a dishwasher cleaner, and run a hot cycle with the machine empty.
- Finish the interior: wipe down the door and controls, and leave the door slightly open to air out.
How often should each task be done?
Different parts need attention at different intervals. Light, frequent upkeep prevents the need for heavy scrubbing later.
| Task | Suggested frequency | Why it matters |
|---|---|---|
| Wipe door seal and edges | Every week or two | Stops crumbs and mold at the source |
| Rinse the filter | Every week or two | Prevents odors and poor drainage |
| Run a cleaning cycle | About monthly | Removes grease and mineral buildup |
| Check spray arm holes | As needed or monthly | Keeps water spraying evenly |
Vinegar or a commercial cleaner: which should you use?
Both approaches work, and the right choice depends on your preference and how much buildup you have. Plain white vinegar is inexpensive and helps cut grease and odors, and many people already have it on hand. Commercial dishwasher cleaners are formulated to tackle grease and, in some cases, hard-water scale, so they can be a better fit if you have heavy mineral buildup. Whichever you pick, use only one at a time and follow any directions on the label.
| Option | Strengths | Keep in mind |
|---|---|---|
| White vinegar | Cheap, cuts grease and odors | Use alone; never mix with bleach |
| Commercial cleaner | Designed for grease and scale | Follow the product directions |
| Baking soda rinse | Freshens and lightly deodorizes | Best as a supplement, not a full clean |
How can you fix common problems?
Most complaints have simple causes. A bad smell usually traces back to a dirty filter or trapped food in the seal, so cleaning those first solves it in many cases. Cloudy or spotty dishes often point to hard-water minerals or buildup on the spray arms; cleaning the interior and using a rinse aid frequently helps. If dishes come out gritty, the filter is the first place to check.
To keep problems from returning, scrape plates before loading, run the hot water at your sink briefly before starting a cycle, and avoid overloading so water can reach every surface. Loading dishes so they do not block the spray arms, and making sure tall items do not stop the arms from spinning, also improves results. If you use detergent tablets, store them somewhere dry, because damp tablets can dissolve poorly and leave residue.
Water hardness plays a bigger role than many people realize. In hard-water areas, minerals build up faster and leave a chalky film on both dishes and the interior. Using a rinse aid, and in some regions adding dishwasher salt if your machine has a softener compartment, can noticeably reduce spotting. Periodically running a cleaning cycle with a product designed to remove mineral scale helps keep hard water from gradually degrading performance.
When should you call a professional?
Cleaning solves most everyday issues, but some signs point to a mechanical or plumbing problem that needs expert help. If the dishwasher still drains poorly, leaves standing water, leaks onto the floor, or cleans badly after a thorough cleaning, contact a qualified appliance technician. Persistent error codes or electrical concerns are also reasons to seek professional service rather than attempting repairs yourself. Working around water and electricity carries real risk, so it is wise to know your limits and call a professional when a fix goes beyond routine cleaning and simple maintenance.
Frequently asked questions
How often should I clean my dishwasher?
A quick wipe of the door, edges, and filter every week or two helps prevent buildup. A deeper clean, including running an empty cycle with a cleaning agent, is commonly done about once a month. If you notice odors or cloudy dishes, clean it sooner.
Can I use vinegar to clean my dishwasher?
Yes, many people run a cycle with a bowl of plain white vinegar placed upright on the top rack to help cut grease and odors. Use it on its own and never mix it with bleach, since combining them can create hazardous fumes. If you prefer, a commercial dishwasher cleaner works too.
Why does my dishwasher smell bad?
Odors usually come from trapped food debris in the filter, along the door seal, or in the drain area. Cleaning the filter and wiping the gasket removes most of the source. Running a hot empty cycle afterward helps freshen the interior.
How do I clean the dishwasher filter?
Most modern dishwashers have a removable filter at the bottom that twists or lifts out. Rinse it under warm running water and use a soft brush to loosen stuck-on debris, then reseat it firmly. Check your appliance manual if you are unsure how it detaches.
Why are my dishes coming out cloudy or spotty?
Cloudiness or spots are often caused by hard water minerals, buildup in the machine, or a clogged spray arm. Cleaning the interior and spray arm holes usually helps, and a rinse aid can reduce spotting. Persistent hard-water film may need a product designed to remove mineral deposits.
Is it safe to mix cleaning products in a dishwasher?
No. You should never mix bleach with vinegar or other acids, because the combination can release dangerous gases. Use one cleaning agent at a time and rinse between different products. When in doubt, stick to a single dedicated dishwasher cleaner.
When should I call a professional for my dishwasher?
If the dishwasher still smells, drains poorly, leaks, or cleans badly after a thorough cleaning, there may be a mechanical or plumbing issue. Persistent standing water or error codes are also signs to seek help. A qualified appliance technician can diagnose problems safely.
