The "x" key keeps popping out on my Macbook Pro. How to proceed?

The laptop is from 2010, so it’s definitely out of warranty. I can mush it back in, but in a previous post, I used the word “explain” and it popped out again. So, I mushed back in, heard a little click and once again I’m good to go. Has this ever happened to anyone. Should I use a tiny dab of epoxy, or just push it back in when it pops out! (Like, writing the word “epoxy” and the key was fine.) How should I proceed?