An automatic dishwasher washes plates and glasses daily, but it still requires regular maintenance to keep operating efficiently. Food particles, grease film, and hard-water minerals accumulate inside the fine mesh filter, along rubber door seals, and around the lower spray arms. Left unchecked, this decay traps moisture and causes stale, sour smells to transfer back onto clean dishes.
However, cleaning a dishwasher requires following manufacturer guidelines—routine maintenance clears food residue and surface film, but it cannot fix plumbing drainage blockages, broken wash impellers, or mechanical pump failures.
To see how dishwasher maintenance fits into a broader room refresh, consult our complete kitchen deep cleaning checklist.
What Is the Best Way to Clean a Dishwasher?
The best way to clean a dishwasher is to clear loose food debris from the tub bottom, check whether your model features an accessible filter and wash it with warm soapy water, wipe down the flexible door seals, and run a hot, empty cleaning cycle using a manufacturer-approved dishwasher cleaner.
Check the Manual Before Removing Any Parts
Before cleaning your appliance, review your owner’s manual. Modern dishwashers generally fall into two categories:
- Manual-Clean Filters: Feature a removable plastic cylinder and mesh screen sitting in the tub floor that requires periodic hand washing.
- Self-Cleaning / Hard Food Disposers: Feature an internal grinding blade system that grinds down small food particles; these systems usually lack a removable user filter.
Never force internal components. If a screen or filter cover is screwed down or sealed, it is not designed for homeowner removal.
Gather Nonabrasive Tools and a Dishwasher-Safe Cleaner
Gather these basic cleaning supplies before you begin:
- A soft microfiber cloth or sponge
- A soft-bristled nylon brush or old toothbrush
- Mild liquid dish soap and warm water
- A manufacturer-approved dishwasher cleaner tablet or powder (such as Affresh®)
Critical Safety Warning: Never use standard liquid hand-dishwashing soap (like Dawn or Palmolive) inside an automatic dishwasher. Hand dish soap creates massive foam suds that overflow the appliance door, flooding your kitchen floor and damaging internal electronics.
How to Clean the Filter, Seals and Interior
Follow this step-by-step procedure to clean accessible interior components safely:
1. Remove Food Debris and Clean an Accessible Filter
Clear any standing food scraps, bones, or glass fragments from the bottom of the tub basin. If your model features a manual-clean filter assembly, turn the filter cylinder counterclockwise and lift it straight out.
Take the filter assembly to the sink and rinse it under warm running water. Use a soft-bristled brush and mild liquid dish soap to gently scrub away caked-on grease, coffee grounds, and white mineral deposits from the fine plastic mesh screen. Avoid using wire brushes, steel wool, or sharp utensils, which can puncture or tear the delicate filter mesh.
What to Do If the Filter Does Not Release Easily
If the filter cylinder resists turning or appears locked in place by mounting screws or clips, stop immediately. Consult your owner’s manual rather than forcing, twisting, or unscrewing internal housing assemblies, which can snap plastic tabs or compromise water seals.
[ Dishwasher Filter Assembly Care ]
┌──────────────────────────────┐
│ 1. Turn Cylinder Counter- │
│ clockwise & Lift Up │
└──────────────┬───────────────┘
│
▼
┌──────────────────────────────┐
│ 2. Rinse Under Warm Water & │
│ Scrub Mesh Gently │
└──────────────┬───────────────┘
│
▼
┌──────────────────────────────┐
│ 3. Reinsert & Twist Clockwise│
│ Until Securely Locked │
└──────────────────────────────┘
2. Wipe Door Seals and the Door Edges
The flexible rubber door gasket along the frame and the unwashed bottom edge of the stainless-steel door receive very little rinse water during a cycle. As a result, grease film, splash splatters, and black mold spots collect in these dark crevices.
Dampen a soft microfiber cloth with warm water and a few drops of mild dish soap. Carefully wipe down the rubber gasket folds and around the door perimeter. Be gentle along the top control panel edge to avoid saturating touch buttons or electrical displays with excess liquid.
3. Inspect Spray-Arm Openings Without Forcing Them
Inspect the small water jet holes along the upper and lower rotating spray arms. If you notice visible obstructions—such as fruit seeds, toothpick splinters, or hard-water crust—use a wooden toothpick or soft brush to clear the openings gently. Do not unsnap or unscrew spray arms unless your manual provides explicit instructions for doing so. Reinstall the clean filter assembly by twisting it clockwise until it locks securely back into place.
Run the Correct Dishwasher Cleaning Cycle
Once the physical debris is cleared and the filter is reinstalled, run a dedicated cleaning cycle to break down hidden grease film and mineral scale from internal plumbing lines.
Dishwasher Cleaner vs Vinegar: What Does Your Manual Allow?
Always check your manufacturer’s specific care guidelines (such as Whirlpool’s dishwasher cleaning guide) before selecting a cleaner:
- Approved Commercial Cleaners: Formulated cleaning tablets or powders are engineered to dissolve fats and limescale safely while protecting internal rubber seals and plastic pumps. Place the tablet in the main detergent dispenser cup or tub floor as directed by the product label.
- White Distilled Vinegar: Some manufacturers permit placing a dishwasher-safe bowl filled with 1 cup of white distilled vinegar on the top rack of an empty dishwasher and running a hot water cycle. However, frequent or concentrated use of vinegar’s acetic acid can erode internal rubber gaskets and pump seals on certain models.
Safety Warning: Never combine vinegar with chlorine bleach or bleach-containing cleaning products. Mixing acids and bleach releases toxic chlorine gas.
Clean the Exterior Without Leaving Streaks
Wipe down the outer door panel, handle, and control interface using a damp microfiber cloth. For stainless-steel panels, wipe in the direction of the metal grain using a dedicated stainless-steel cleaner or a lightly dampened microfiber towel, followed immediately by a dry microfiber cloth to prevent water spots and smudges.
Why a Dishwasher Still Smells or Holds Water
If your appliance continues to smell sour or leaves standing water in the tub floor after a complete cleaning cycle, use this troubleshooting table:
| Symptom / Problem | Primary Cause | Action Required | Next Steps |
| Sour, Rotten Food Smell | Trapped food decay inside filter mesh, spray arm jets, or door seals. | Wash manual-clean filter with warm soapy water; wipe gaskets. | Run a hot cycle with an approved dishwasher cleaner. |
| Musty / Soap Scum Odor | Overusing detergent, non-HE detergent, or low water wash temperatures. | Reduce detergent dosage; run a hot water cycle before loading. | Select high-temp wash options for heavy grease loads. |
| Standing Dirty Water in Tub | Clogged sink disposal knock-out, kinked drain hose, or clogged house drain. | Clear garbage disposal (if connected); check drain hose under sink. | Contact a licensed plumber or appliance repair service. |
| Grinding / Rattling Noise | Foreign debris (glass, bone, fruit pit) caught in the pump impeller cavity. | Stop cycle. Inspect accessible tub basin for loose objects. | Call a qualified appliance technician to service the pump. |
A Simple Maintenance Checklist Based on Use
Adjust your dishwasher maintenance routine based on your household’s daily cooking volume and food types:
- Weekly: Check the tub bottom for stray food debris; inspect and rinse the manual-clean filter if you wash heavy dinner pans daily.
- Monthly: Wipe down the rubber door gaskets, door edges, and spray-arm holes; run an empty hot water cleaning cycle with an approved cleaner.
- Quarterly: Inspect the cabinet interior beneath the dishwasher and under-sink plumbing connections for signs of slow moisture leaks.
Integrating these steps into your daily household habits is a great way to handle maintaining your kitchen between visits from professional cleaners.
Bring the Rest of Your Kitchen Back Under Control
Keeping kitchen counters, stovetops, range hoods, backsplashes, and cabinet faces spotless requires continuous, detailed effort. For homeowners across Taskforce’s Massachusetts service areas, our professional team provides thorough, high-quality housekeeping.
Please note that while our house cleaners deliver exceptional surface cleaning, floor care, and general kitchen maintenance, our scope focuses on residential surface care—we do not perform mechanical appliance repairs, plumbing diagnostics, or internal component teardowns.
Looking for reliable cleaning support for your living spaces? Contact Taskforce Cleaning Services today to learn more about our professional deep house cleaning and request a customized quote.
Frequently Asked Questions
Can I clean my dishwasher with vinegar?
Only if your specific owner’s manual explicitly permits it. While some manufacturers allow placing a bowl of white vinegar on the top rack during an empty hot cycle, frequent use of acetic acid can weaken internal rubber seals and pump gaskets over time. Never mix vinegar with bleach-based products.
How often should I clean the dishwasher filter?
Cleaning frequency depends on your usage, water hardness, and whether you pre-rinse dishes. As a general guideline, rinse manual-clean filters once a month. If you cook heavy meals daily and load dishes with stuck-on food, inspect and rinse the filter weekly.
Why does my dishwasher smell after cleaning?
Persistent odors after a complete cleaning pass often indicate an underlying plumbing or drainage issue—such as a kinked drain hose under the sink, a clogged garbage disposal connection, or a blocked house drain line that allows dirty wash water to back up into the unit.
Can I use dish soap in the dishwasher?
No! You should never use liquid hand-dishwashing soap (such as Dawn or Palmolive) in an automatic dishwasher. Hand dish soap creates excessive sudsing that will overflow the door, flood your kitchen floor, and damage electrical components. Always use detergents specially formulated for automatic dishwashers.
Do all dishwashers have removable filters?
No. While most modern European and quiet-operation dishwashers feature removable manual-clean mesh filters, many older models and units with hard-food disposers feature self-cleaning grinding systems that do not have a removable user filter screen. Consult your owner’s manual to identify your exact filter design.
