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Here is my white device, which has turned yellow on one side while cooking an over done cheese burger:

device color turned yellow

Does anybody know whether it is possible to turn it back to the white color?

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Probably not, plus it will get worse over time.

I've an old George Foreman with similar marking.
Neither oxygen nor chlorine bleach works - plus it smells.
The only thing that very slightly works is a good hard scrub with something quite aggressive, oven cleaner or barman's friend etc, which will eventually take all the paint off.

You'll just have to live with it.

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  • 7
    Likely it's oxidized and polymerized oils, like furniture varnish. Might instead be the plastic itself (or plasticizer) getting oxidized. Barring a good hard scrub, or sandpaper, you have to live with it. – Wayfaring Stranger Jan 11 '20 at 23:13
  • By oxygen, I assume you mean something like retrobrite - that's meant for a super specific kinda yellowing. If it was yellow all over, it might work, something about promine – Journeyman Geek Jan 11 '20 at 23:57
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    Oxygen bleach == hydrogen peroxide. I had to google retrobrite; it's not as specific as that, it's just a kitchen spray cleaner with peroxide instead of chorine. Better for the environment as it breaks down to water & oxygen. – Tetsujin Jan 12 '20 at 7:56
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Try Magic Eraser Sponges, available at most stores that sell cleaning supplies. They really ARE magic for things like this very often! Worth the effort.

https://www.amazon.com/Clean-Durable-Cleaning-Durafoam-Packaging/dp/B00BR1FSU8/

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