My Fitbit Inspire is water damaged and doesn't turn on

My Fitbit Inspire (not HR) is saltwater damaged and doesn't turn on anymore. Is it a lost cause, or can it be fixed? If it is a lost cause, then are there any teardown guides?

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I found this recently with a quick search: https://www.youtube.com/watch?v=T-leMPnx... (mute warning)

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