How do I remove keys?

@rat45782 If the keys are loose, most likely the clips beneath them are broken.

If they're loose enough, you can flip them up and take a look underneath to see if the clips are broken.

If they require pressure to detach, don't pry them up because they can break off completely.

If they're just loose, you can try to reattach them following this video. Be careful because these keys are not meant to be removed and reattached, so they can be easily broken if they are not already.

If the clips are broken, the cheapest way to fix them would be to replace the keyboard altogether.