Chosen Solution
A while back, my ‘w’ key stopped working. I investigated, and it seemed the plastic ‘cup’ of the key had actually fell off, so I had to replace the entire base (I’m not sure what to call it) using replace my keys - I’m hours away from the nearest apple store with no car. So I got the replacement, and I had to peel off the base and put down the new one. However, while it’s now functional, it falls off incredibly easy. There seems to be missing a ‘glue’ component of some sort that keeps it on the keyboard. What should I do?
The butterfly key caps are the worse! There is a set of small tabs on the edge which clips it on. What happened is the tabs snap off or wear so the caps don’t stay on. Time to visit the Apple Store Sorry ;-{ It should be covered under warranty