Oopsie!
Since 1984 when I got my first computer, whenever I get a sticky key, I pop the key off the keyboard, clean the crud and pop it back on.
The laptop I was gifted with by Melanie is different.
The right cursor key was sticking. I had to {TAP} the key vigorously. So I popped the key. Little metal thingies also popped out and the key will not pop back on.
Key works but no keycap.