Keyboard Keys

Sometimes the keypads on my laptop keyboard come loose.  I don't know why, but they do.  It takes some finagling, but pushing and pushing generally gets them to working again.  I am not sure why the keyboard demons and imps do this, but they do...

I remember typewriters, and sometimes, the typewriter keys would stick.  Sometimes the bars holding the keys would mysteriously get bent.  I never understood that. Now, I do not understand how my keypads get loose... Weird.