Question: I've found a good-condition earphones in an old bag, and I've managed to clean the earphone cords with a rag and alcohol, I've also found **[this video](https://www.youtube.com/watch?v=tVeH2rhocSY)** which suggests to clean them with **Window Cleaner Liquid** which also helped me remove the last dirty of the places that alcohol couldn't remove it.

But on the plugin area, I can't seem to remove the "yellow" color. How can I clean this yellow area?

[![enter image description here](https://i.stack.imgur.com/GAEtim.png)](https://i.stack.imgur.com/GAEti.png)

Answer: 
I hate to break it to you, but short of shaving or chemically melting off the outer layer of discolored plastic, you can't really remove that kind of discoloration. And that is if it only penetrated shallowly. If it was due to some kind of volatiles that were able to work themselves deeply into the polymer structures, then it is a total wash. But as mentioned at first, you could always try shaving off the outer layers carefully of course. I wouldn't try chemical means though as you stand a pretty good chance of actually driving the discoloration deeper.
use white toothpaste :) it works on my white earphone turned yellowish