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Why don’t Our Clear Phone Cases Turn Yellow? A Complete Analysis of Testing, Materials and Real-life Effects

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joyporodo

On June 2, 2025

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Clear phone cases are loved for showing off the beauty of the phone’s design, but they also have a common problem: yellowing. If you’ve searched for “how to clean clear phone case that turned yellow” or “why do clear phone cases turn yellow”, you’re not alone. As a professional phone case manufacturer, we have developed a solution specifically for this pain point. Create real clear phone cases that don’t turn yellow.

This article will explain in detail why most clear phone cases turn yellow, how to clean clear phone cases that turned yellow. And how we keep the phone cases clear and transparent for a long time through professional design and testing.

Why do Clear Phone Cases Turn Yellow?

Yellowing is most common in TPU (thermoplastic polyurethane) phone cases. The main reasons are as follows:

UV exposure: UV in sunlight can cause photodegradation, destroying the molecular structure and causing discoloration.
Oxidation: Heat and oxygen accelerate the oxidation reaction of the material, causing the appearance to turn yellow.
Body Oils & Sweat: During daily use, hand oil and moisture accumulate and easily cause stains.
Low-Quality Materials: Low-end products lack UV and antioxidant ingredients and are more prone to yellowing.

In addition to the above reasons, some manufacturers omit material processing steps or coating processes during the production process, which greatly increases the risk of yellowing of products. If you want to avoid these problems, choosing a clear phone case that doesn’t turn yellow is the key.

How to Clean Clear Phone Cases That Have Turned Yellow

If you are looking for how to clean clear phone case that turned yellow, the following home cleaning tips may help, suitable for mild yellowing:

Baking Soda + Toothpaste: Use a toothbrush to clean in circles and then rinse, suitable for surface stains.
White Vinegar Soak: Soak for 30–60 minutes, then wipe and rinse.
Rubbing Alcohol: The cleaning effect is limited and only suitable for stains and shallow discoloration.

In addition, some people online recommend using bleach, but such chemicals may damage the shell material and are not recommended for long-term use. If the yellowing is deep, it is usually recommended to replace it directly, especially if you use low-end clear phone cases without anti-yellowing treatment.

How do we Prevent the Yellowing of Clear Phone Cases?

We specialize in manufacturing clear phone cases that don’t turn yellow, and ensure durability through high-end materials and rigorous testing:

1. High-quality TPU + Anti-Yellowing Additives

We use advanced TPU with anti-UV and anti-oxidation formulas, which has an anti-yellowing ability of more than 40% higher than ordinary materials.

2. UV Aging Simulations

Aging tests are performed in a simulated sunlight environment for 3-6 months, and color difference is detected using a spectrometer to ensure long-term transparency.

3. Heat & Humidity Endurance

Tested in an environment of 70°C and 90% humidity for 72 hours to simulate real use conditions in tropical areas.

4. Nano Anti-Stain Coating

Our exclusive coating prevents sweat, oil and dust from adhering, while facilitating daily cleaning.

5. In-House Quality Control

Each batch of products is sampled and tested to ensure batch stability and consistency without early yellowing.

That’s why our clear phone cases that don’t turn yellow are trusted by many wholesale customers.

Actual Effect Case: Clear Case Lasts as Long as New

One of our Southeast Asian wholesale customers faced a 12% return rate when using market products. After switching to our upgraded anti-yellowing TPU case, the return rate dropped to less than 2% within three months. Customer feedback: “It is still transparent after outdoor use for a period of time.”

Another European customer listed our products on Amazon. The listing has accumulated more than a thousand positive reviews, among which “clear case does not turn yellow” has become one of the core evaluation keywords. Many buyers searched for how to clean clear phone cases that turned yellow and decided to try our products.

Clear phone case that doesn't turn yellow with MagSafe ring design

Why Choose our Clear Phone Cases?

For retailers and distributors, reducing returns and improving customer satisfaction are crucial. Our advantages include:

Support OEM/ODM production customization
Strict self-inspection process and laboratory testing
Factory direct supply price advantage
Free anti-yellowing sample testing
A variety of transparent shell structures/styles available (soft shell, hard shell, mixed shell)
Quick sample delivery + peak production guarantee

In addition, we provide brand customization solutions for customers with large orders. Including LOGO printing, anti-counterfeiting labels and environmentally certified material selection. Choosing a truly durable and clear phone case that doesn’t turn yellow is to improve brand reputation and customer repurchase rate.

Correct Maintenance Suggestions: How to Clean Clear Phone Case

To extend the life of the product, we recommend that customers take the following maintenance methods:

Wash with mild soap every week
Avoid prolonged direct sunlight
Keep away from chemicals such as perfumes and cosmetics
Wipe with microfiber cloths instead of paper towels
Store properly when not in use for a long time and avoid contact with dyes

These methods can help delay the yellowing of clear phone cases, especially in hot and humid climates overseas. If your customers are still asking how to clean clear phone case that turned yellow, be sure to share this guide with them.

clear phone case that doesn't turn yellow

Conclusion: Make Clear Last Longer and Make Customers More Satisfied

Clear phone cases should not be disposable products. As long as the raw materials are high-quality, the process is reasonable, and the maintenance is proper, clear phone cases can remain clear as new for months or even longer.

If you are looking for a trustworthy phone cases clear supplier, please contact us for samples or quotes. We are committed to providing customers with high-quality products that stand the test of time, and can provide customized cooperation solutions to help you expand your market.