Over time, owners of household appliances often notice that the snow-white shelves and inner walls of the chamber lose their original luster. The appearance of an unpleasant yellowish tint on polymer surfaces is a natural but irritating oxidation process. Many people mistakenly believe that the equipment has fallen into disrepair, but it is quite possible to return it to a neat appearance at home.
Yellowness occurs not only due to dirt, but also due to the reaction of materials to temperature changes and exposure to ultraviolet radiation. ABS plastic, from which the internal lining is most often made, contains special flame retardant additives that prevent ignition. It is these additives that, under the influence of light and time, change their chemical structure, giving the surface a characteristic color.
Before taking active steps, it is necessary to assess the scale of the problem and the condition of the coating itself. If the yellowness is superficial, gentle methods will help, but deep changes will require more aggressive compounds. It is important to act carefully so as not to damage the texture or break the tightness of the seals.
Why does plastic change color and can it be stopped?
The main reason for the color change is the degradation of molecular bonds in the polymer. Modern refrigerators contain materials that are resistant to cold, but they are sensitive to oxidation by oxygen. This process is called photo-oxidative destruction, and even ordinary artificial lighting inside the chamber can start it.
In addition, the rate of appearance of yellow spots is affected by fats and oils that end up on shelves during food storage. Penetrating into the micropores of plastic, fatty acids create an ideal environment for pigmentation changes. Regular washing with ordinary soap is often not able to completely remove these stubborn stains.
⚠️ Attention: The use of abrasive sponges with a hard side is strictly prohibited. Microscopic scratches will become a place for bacteria to accumulate and will accelerate the yellowing process in the future.
It is impossible to completely stop the natural aging of plastic, but you can significantly slow down this process. To do this, it is recommended to avoid direct sunlight on the housing and internal elements when defrosting. It is also worth minimizing the contact of surfaces with aggressive chemicals not intended for food equipment.
Preparation for cleaning: safety and necessary tools
Before starting the procedure, you must completely disconnect the refrigerator from the power supply. Working with chemicals and water requires precautions to avoid the risk of short circuit or electric shock. It is better to remove all removable elements, such as shelves and drawers, and wash them separately in a bathtub or large basin.
To work, you will need a set of simple tools that can be found in every home. It is important to prepare soft microfiber cloths that do not leave lint, and sponges with a soft porous structure. Using rough brushes can permanently damage the glossy surface.
Be sure to provide good ventilation in the room, especially if you plan to use hydrogen peroxide or special sprays. Fumes from chemical reactions may be unpleasant to the respiratory tract. Do not neglect the use of rubber gloves to protect the skin of your hands from drying out and irritation.
☑️ Preparation for cleaning
Mechanical cleaning and folk remedies
The most affordable and safest way to clean the plastic of a refrigerator from yellowness is to use laundry soap. It effectively breaks down fatty deposits, which are often disguised as a change in the color of the material itself. To enhance the effect, soap shavings can be dissolved in warm water until a thick paste is obtained.
Apply the resulting mixture to the contaminated areas and leave for 15-20 minutes. During this time, the alkaline environment will soften old dirt. After this, thoroughly scrub the surface with a soft sponge and rinse with clean water, wiping dry with a towel.
Another popular method is to use baking soda. This is a soft abrasive that does not scratch the surface, but polishes it perfectly. Mix soda with a small amount of water until it becomes sour cream and treat problem areas in a circular motion.
If traditional methods do not give the desired result, you can resort to stronger, but more affordable means. Alcohol-containing liquids perfectly degrease the surface, restoring its dullness. However, you should be careful with the concentration so as not to overdry the material.
Use of hydrogen peroxide and bleaches
The most effective way to combat chemical discoloration is to use hydrogen peroxide. This substance has a powerful oxidizing property that allows you to destroy yellow pigments at the molecular level. To achieve the result, you will need a solution with a concentration of at least 3%, and in difficult cases - 6-12%.
There are two main ways to use peroxide. The first is wiping with a generously dampened rag, the second is soaking the removable parts. In the second case, the effect occurs faster and appears more evenly over the entire area of the product.
You can also find special bleaches for plastic containing active oxygen in hardware stores. They act more gently than chlorine-containing analogues and do not destroy the structure of the polymer. When using such products, strictly follow the instructions on the packaging and do not exceed the exposure time.
| Product | Concentration | Exposure time | Efficiency |
|---|---|---|---|
| Peroxide hydrogen | 3-12% | 2-12 hours | High |
| Laundry soap | 72% | 30-60 minutes | Medium |
| Food grade soda | Paste | 15-20 minutes | Low |
| Alcohol solution | 70% | 5-10 minutes | Medium |
After treatment with chemical agents, it is necessary to thoroughly rinse all parts with plenty of clean water. Residues from peroxide or bleach may continue to react and cause skin irritation when coming into contact with products in the future. It is better to dry the elements at room temperature away from direct sunlight.
Specialized chemistry for plastic restoration
If homemade recipes seem too labor-intensive, the industry offers ready-made solutions. Sprays for cleaning plastic from yellowness contain a complex of solvents and surfactants. They are designed specifically for car showrooms and household appliances, therefore they are safe for materials.
When choosing a product, pay attention to the presence of food contact safety labels. Some formulations may leave a toxic film that is not recommended for food storage. It is better to choose products from well-known brands that specialize in the care of kitchen appliances.
⚠️ Attention: Avoid using acetone and chlorine-based solvents. They can melt the top layer of plastic, making the surface sticky and rough.
The use of specialized impregnated wipes also shows good results. They are convenient for express cleaning of small areas and hard-to-reach places where a sponge cannot fit. Regular use of such products prevents the accumulation of dirt.
Is it possible to use a melamine sponge?
A melamine sponge works like an eraser and effectively removes the surface layer of yellowness. However, it thins the plastic, so its use is often not recommended.
Prevention of yellow spots
In order not to look for ways to clean the plastic of the refrigerator from yellowness again, it is important to follow the operating rules. First of all, keep the chambers clean and immediately remove spilled liquids and crumbs. Grease stains are the main enemy of white color.
Regularly ventilating the refrigerator during defrosting helps remove excess moisture and prevent the formation of condensation, which also promotes oxidation. Do not place hot foods inside, as sudden temperature changes accelerate the aging of materials.
Once a month, carry out a preventive wipe of the shelves with a weak solution of vinegar or citric acid. The acidic environment neutralizes alkaline deposits and gives the surface shine. This simple procedure will take only a few minutes, but will extend the life of your equipment.
Frequently asked questions (FAQ)
Is it possible to use bleach (Whiteness) for bleaching?
The use of chlorine-containing products is highly not recommended. Chlorine reacts with plastic, making it brittle and brittle. In addition, it can have the opposite effect and increase yellowness over time.
Will toothpaste help remove yellow stains?
Toothpaste works as a mild abrasive and can remove surface plaque. However, it is powerless against deep chemical color changes. Use it only for local polishing of small areas.
How often should you wash the inside of the refrigerator?
The optimal frequency of general cleaning is once every 3-4 months. Preventative wiping of shelves should be carried out weekly when loading new products.
Is it safe to use a steam cleaner for plastic?
A steam cleaner can be used with caution, directing the jet at an angle and not staying in one place for a long time. High temperatures can deform the thin plastic of the shelves.