Maintenance2026-04-25/5 min read
Why does every local clear case turn yellow in 2 weeks?
Frustrated with yellow cases? Here is the science-based yellow clear case solution to keep your phone looking clean.
IP
Rohan Mehta/The iPhone Project Journal
It is highly annoying when your fresh clear case turns a dirty yellow-brown color. What is the yellow clear case solution?
The yellowing is caused by a chemical reaction when cheap TPU plastic is exposed to UV light (from the sun) and oils from your sweaty palms.
To solve this, look for clear cases that use a rigid polycarbonate backplate combined with UV-stabilized aliphatic TPU bumpers, which resist oxidation and stay clean much longer.