This was an unusual problem that caused these flute keys to be stuck. In this video, Art figures out what went wrong and them fixes the problem.
Here is the link to "How To Polish Flute Keys"
https://youtu.be/TjBQiZYzcfI
Here is the link to "How To Thoroughly Polish a Flute (With Dis-assembly)"
https://youtu.be/uKy_8F9cLB8
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