Deep Guide to Dishwasher Use and Maintenance: Detergent Selection and Longevity Care

Bought a dishwasher but dishes aren't coming out clean? White water spots on your tableware? Strange odors coming from the machine? All these problems have solutions. This guide covers every key point of daily dishwasher use, keeping your machine in peak condition for the long haul.

I. Scientific Detergent Selection

Types of Dishwasher-Specific Detergents

Powder Detergent

Ingredients: Sodium carbonate, silicates, enzymes, bleach
Advantages: Low price, strong cleaning power, good bleaching function
Disadvantages: Sometimes doesn't dissolve completely, can irritate skin
Suitable for: Heavily soiled dishes with grease, tea stains, or coffee stains

Tablet Detergent (Dishwasher Tablets/Pods)

Compressed solid blocks, usually combining detergent + rinse aid + salt
Advantages: Convenient to use, no need to add rinse aid separately
Disadvantages: Fixed formula, cannot adjust individual component amounts
Suitable for: Soft water areas (hard water areas still need separate salt addition)

Liquid Detergent

Fast dissolving, good cleaning performance at low temperatures
Usually bleach-free, gentler on colored tableware
Suitable for: Fine tableware, colored dishes

Dishwasher-Specific Gel Detergent

Gel form, cleaning performance between powder and liquid
Easy to measure
Note: Regular hand-washing dish soap cannot be used in dishwashers (foaming agents will damage the machine)

II. Three Essential Consumables: Detergent, Rinse Aid, and Specialized Salt

Rinse Aid (Drying Agent)

Function: Reduces the surface tension of water, allowing water droplets to slide off instead of remaining on dishes, preventing water spots (white water stains)

Consequences of not using rinse aid:

Dishes show obvious water spots and mineral deposits after drying
Glassware develops a hazy, foggy appearance

Dosage Recommendations:

Hard water areas: Set dosage to maximum
Soft water areas: Can be reduced appropriately
How to tell if more is needed: If dishes still have water spots, increase rinse aid dosage

Dishwasher-Specific Salt (Water Softener Salt)

Function: Regenerates the built-in ion exchange resin in the dishwasher, removing calcium and magnesium ions from hard water, preventing limescale buildup

Many people think, "I use all-in-one tablets, so I don't need salt" — this is a misconception:

The amount of salt in all-in-one tablets is far from sufficient to regenerate the ion exchange resin
Hard water areas (water hardness >150ppm) must add salt independently
Soft water areas (<100ppm) can reduce the frequency of salt addition

How to Check Water Hardness:

Contact your local water utility company
Or purchase a water quality test pen (TDS meter) to measure
TDS value reference: <100 is soft water, 100~300 is hard water, >300 is very hard water

Salt Addition Frequency:

Hard water areas: Every 1~2 months
The machine's salt reservoir has a water level sensor; the machine will prompt you to add salt

III. Proper Dish Loading: The Factor That Most Affects Cleaning Results

Upper Rack (Suitable For)

Glasses, small bowls, mugs
Place upside down (open side facing down) to prevent water pooling
Unstable hollow tableware: Use fixing clips to prevent tipping

Lower Rack (Suitable For)

Large bowls, plates, pot lids
Leave gaps between dishes; do not stack them
Angle dishes so water spray can reach the inside
Do not block the spray arm rotation (manually rotate the spray arm one full turn after loading to confirm no obstruction)

Cutlery Basket

Mix forks and knives to prevent nesting
Place blades pointing downwards to avoid cuts when unloading
Long-handled utensils: Lay flat in the designated area on the upper rack

Common Loading Mistakes

❌ Large pot blocking the spray arm — water flow cannot reach the upper rack ❌ Stacking bowls — stacked areas will never get clean ❌ Putting wooden utensils in — they will crack and deform over time ❌ Putting cast iron cookware in — it will rust, and the coating will be damaged

IV. Selecting a Wash Cycle

Common Cycle Breakdown

Cycle	Water Temp	Time	Suitable Scenario
Quick Wash	40~50°C	30~45 min	Lightly soiled dishes after a meal, washed the same day
Normal/Standard	55~60°C	60~90 min	Daily use
Heavy/Intensive	65~70°C	90~120 min	Heavy grease, overnight dishes
Eco	50°C	Longer	Light soil, saving energy
Sanitize	75°C+	Longest	Baby bottles, medical purposes
Rinse/Hold	Cold	15 min	Temporary storage of dishes

Key Factors for Choosing a Cycle:

Level of soiling: Heavy grease needs high heat, light soil can use quick wash
Time constraints: Choose quick wash if you're in a hurry
Special materials: Colored glazes, fine porcelain should use low temperature

V. White Water Spots and Limescale: Causes and Solutions

White Water Spots (Water Stains)

Root Cause: Minerals (calcium, magnesium) in the water remain on the dish surface as water evaporates

Solution Priority:

Check if rinse aid is empty → Refill rinse aid
Increase the rinse aid dosage setting
Confirm the machine's salt reservoir is full
Check water quality, consider an external water softener filter

Limescale Inside the Machine

Symptoms: White, hard deposits on the inner walls of the dishwasher; spray arm nozzles clogged

Regular Cleaning Methods:

Once a month: Run an empty cycle with a dishwasher cleaner
Can use white vinegar as a substitute: Place a cup of white vinegar on the rack and run a high-temperature cycle
Clogged spray arm nozzles: Remove the spray arm and use a toothpick to clear each nozzle

VI. Daily Maintenance and Deep Cleaning

Filter Cleaning (Most Important!)

The dishwasher has a filter screen at the bottom that traps food debris:

Cleaning Frequency: At least once a week Steps:

Remove the lower rack
Unscrew the filter assembly counter-clockwise
Rinse with warm water, use a soft brush to remove grease and residue
Reinstall in its original position

Consequences of a Dirty Filter: Hindered water circulation, poor cleaning performance, bad odors

Door Seal Cleaning

The rubber door seal easily accumulates dirt and mold
Wipe with a damp cloth monthly; use a baking soda solution for heavy buildup
If mold is found: Wipe with food-grade alcohol, then dry thoroughly

Spray Arm Cleaning

Every quarter, remove the spray arms, rinse them, and clear the nozzles
Check if the spray arms rotate freely (worn rotation shafts can cause uneven water distribution)

Deep Cleaning the Machine Interior

Monthly Empty Cycle Cleaning:

Method 1: Place a specialized dishwasher cleaning tablet in the machine and run a high-temperature cycle
Method 2: Sprinkle a cup of baking soda on the bottom of the machine and run a high-temperature cycle
Method 3: Place a cup of white vinegar on the upper rack and run a high-temperature cycle (vinegar removes limescale, baking soda removes odors; these can be done separately)

VII. Common Troubleshooting

Dishes Still Greasy After Washing

Check if enough detergent was used (powder is typically 20~30g)
Verify that the correct dishwasher-specific detergent was used
Confirm dishes are not stacked or blocking the spray arms
For heavy grease, pre-rinse dishes with warm water first

Bad Odor After Washing

Has the filter been cleaned recently?
Is there mold on the door seal?
Has the machine been unused for a long time (closed door traps moisture, leading to mold)?
Solution: Run an empty high-temperature cycle with cleaner + clean the filter + wipe the door seal

Dishes Not Drying Properly (Water Pooling)

Is there enough rinse aid?
Stainless steel containers dissipate heat quickly, so some water droplets are normal
Activate the drying cycle or heated dry function
Do not close the door immediately after the cycle ends; open it to let steam escape

Machine Error Codes (E1/E2, etc.)

E1: Water intake timeout → Check water pressure and inlet valve
E2/E3: Drainage fault → Check if the drain hose is kinked or if the filter is clogged
Refer to your machine's manual for specific error codes, as they vary by manufacturer

VIII. Energy-Saving Tips

Water and Electricity Saving Practices

Run full loads: Washing a half-load on "Quick Wash" is more efficient than running two "Normal" cycles
Use residual heat for drying: After the cycle ends, skip the drying phase and just open the door to air dry (saves ~30% electricity)
Use off-peak hours: Some areas have time-of-use electricity pricing, with lower rates at night
Quick wash cycles: A 30-minute quick wash is sufficient for lightly soiled dishes; you don't need a high-temperature cycle every time

Actual Water Usage Comparison Per Wash

Hand washing: Approximately 40~80 liters (with prolonged rinsing)
Dishwasher standard cycle: Approximately 10~14 liters
Dishwasher eco cycle: Approximately 6~10 liters

As long as you run full loads, a dishwasher uses 1/5 to 1/8 the water of hand washing.

Maintenance Memory Mnemonic: Clean filter every cycle → Run empty monthly clean → Remove spray arms quarterly → Always keep the three consumables topped up (detergent, rinse aid, salt). Follow these four points, and your dishwasher will run like new for 10 years.