Randomly "twitchy" keys, how to take apart for repair?

1) At seemingly random times, the volume keys (up/down/mute) tweak out. There are large time intervals where this does not happen, then suddenly the volume goes into a frenzy of up/down and on/off, which wakes up the cpu when sleeping. Any thoughts?

2) I would take the unit apart to see if I could find anything obvious to repair but I see no easy way to do so without causing some damage. I think there are screws hiding under the 4 little rubber feet, which don't want to come off without a fight.