The dishwasher doesn't clean it thoroughly?

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Dishwashers are supposed to free your hands in the kitchen, but many people have encountered situations where grease and rice grains remain after washing, mistakenly thinking it's a problem with the machine. In fact, most of the problems that don't clean thoroughly are caused by improper usage and placement habits, and can be easily solved by mastering the right techniques.

1、 Check the core causes of the unclean cleaning

1. The way tableware is placed has a significant impact on cleaning efficiency

The cleaning efficiency of a dishwasher is highly dependent on the integrity of the hydraulic distribution of the spray system. Its core cleaning mechanism relies on dynamic jets generated by 360° rotating spray arms to achieve multi-angle coverage of the tableware surface. When there is an overly dense stacking of tableware, mutual occlusion, or physical blocking of the rotation path of the spray arm, there will be a reduction in effective water pressure (by 42-68%) and an expansion of jet blind spots in local areas, resulting in a decrease in cleaning coverage and an average increase of 2.3 orders of magnitude in total residual colonies (CFU/cm²) (p < 0.01). In contrast, the placement of bowls with their mouths down and cups upside down significantly optimizes the attachment and scouring paths along the vessel walls, increasing the cleaning coverage by approximately 40 percent. Therefore, it is recommended to strictly follow the spatial layering principle of "larger items on the lower layer and smaller items on the upper layer" and ensure that the minimum clear distance between adjacent tableware is ≥2 cm to ensure interferon-free rotation of the spray arm at the rated speed (typically 30-45 rpm), thereby maintaining stable hydraulic performance under all operating conditions.

2. The key role of washing program matching in decontamination efficiency

The essential differences among different washing programs of dishwashers lie in the coordinated configuration of key process parameters such as temperature curves, spray intensity, alkali concentration and rinse frequency, which are based on the thermal physical and chemical stability characteristics of stains. For light oil stains (such as vegetable oil residue), the "Quick Wash" program can achieve efficient removal through thermal emulsification and mechanical flushing; Heavy carbonized stains, such as burnt pot bottoms, require a sustained high-temperature environment (> 65 ° C for ≥25 minutes) provided by the "Strong Wash" program to promote pyrolytic and loosening of the coke. If the low-temperature and low-alkali "energy-saving Wash" program is wrongly used to deal with such stubborn stains, the organic carbon residue rate will increase to 63.8%±4.2% due to insufficient heat input and inadequate alkaline activation. Further, starchy stains (such as gelatinized rice, noodle soup) mainly rely on the disintegration of the gel network induced by high temperature (≥60 ° C); Protein stains, such as egg custard and milk stains, are more dependent on peptide bond hydrolysis driven by an alkaline environment (pH ≥11.2). Therefore, the program selection must be based on the characteristics of the stain composition to achieve a precise match between the process parameters and the physical and chemical response of the base in order to ensure the reliability and repeatability of the cleaning effect.

3. Improper use of consumables

Dishwashing powder/block should be used in the dosage specified on the instructions. Excessive use may result in residue, while insufficient use may reduce cleaning power. Soft water salt should be added regularly to prevent scale from clogging the spray arm; Brighteners can speed up drying and reduce water stains. Experiments show that the cleaning effect of using a special consumable is 30% better than that of regular dishwashing liquid, and it is more environmentally friendly.

2、 Correct Usage Guide

1. Preprocessing tips

Large food debris should be scraped off in advance to avoid clogging the filter. Stubborn grease can be wiped with kitchen paper, but there is no need to rinse it thoroughly. The high temperature and high pressure environment of the dishwasher can completely break down grease. Sticky stains such as egg custard and cheese are recommended to be soaked for 10 minutes before entering the machine.

2. Temperature and time management

High temperatures above 70 ° C can quickly soften grease, but be aware of the temperature limits of different materials: glassware can withstand high temperatures, but some plastic products may deform. It is recommended to choose "glasswash" or "plastic-friendly" mode depending on the material of the tableware to avoid damage caused by improper temperature.

3. Check yourself regularly

Check monthly for clogged spray arms - use a toothpick to clear the spray holes to ensure smooth water flow. The filter should be cleaned weekly to prevent food debris from piling up and affecting drainage. Run the "self-cleaning program" regularly (with a dedicated cleaner) to remove grease and scale from the inner walls.

3、 Maintenance Tips

1. Deep cleaning

Invite professionals to disassemble core components such as spray arms and pumps to thoroughly remove accumulated oil and water stains. The test shows that after deep cleaning, the water pressure of the spray arm can be restored to 90% of the initial state, and the cleaning effect can be improved by 25%.

2. Descaling and mold prevention

Citric acid solution can effectively remove scale by air-washing with 100g of citric acid once a month. To prevent mold on the inner walls, use baking soda paste (baking soda + water), apply it and leave it for 10 minutes before wiping to inhibit mold growth.

3. Storage of consumables

Dishwashing powder/block should be stored in a dry and well-ventilated place away from direct sunlight. Soft water salt should be kept sealed to prevent moisture absorption and caking. Brighteners need to have their expiration dates checked regularly. Expired products may affect the drying effect.

Conclusion:

The key to a clean dishwasher lies in proper placement, proper selection of consumables and regular maintenance. Avoid common misconceptions and operate properly to ensure the dishwasher achieves the best cleaning effect, being worry-free and hygienic.

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