https://hackaday.com/2018/01/16/a-salty-solution-for-a-dead-nexus-5x/
Is it the put it in a freezer thing? I've done this with my old old old HTC thingie. It works... for about 10mins. So it might be enough if you're trying to recover data but as for a long-term fix nope.
@Emyr started
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https://hackaday.com/2018/01/16/a-salty-solution-for-a-dead-nexus-5x/