Black dot on laptop screen

I woke up this morning and noticed a tiny, distracting black dot on laptop screen that won't go away. I’ve already tried cleaning the surface with a microfiber cloth, but it seems to be internal. Is a black dot on laptop screen usually a sign of a dead pixel, or could it be dust trapped behind the panel? If anyone has successfully used those "pixel fixer" videos or software, let me know if they actually work for a permanent black dot on laptop screen.
 
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