Casify explains
Why does a clear case turn yellow and what can you do?
Learn what discolours clear material and how to keep it looking clear for longer.
Yellowing is usually not a layer of dirt that can be washed away completely. Light, heat, skin oils and ageing gradually change the clear material itself.
The main causes
UV light and heat accelerate oxidation. Skin oils, cosmetics and dirt can also attach to or migrate into the surface.
What cleaning can do
Mild soap removes surface dirt and oil. The case looks fresher, but chemical discolouration cannot be fully reversed.
How to slow yellowing
Clean regularly, avoid leaving the case in strong sunlight or a hot car, and keep it away from strongly coloured liquids.
When replacement makes sense
Replace the case if it becomes hard, brittle or deformed, or when its edges and buttons no longer fit properly.
Frequently asked questions
Is yellowing a quality defect?
Not always. Many clear plastics change colour over time; the material determines how quickly.
Does bleach help?
It is not recommended. It can damage the material and coating and is unsuitable for frequent hand contact.
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