My MBP's (13" 2011, as noted below) touchpad can hardly be clicked anymore. I have to use near levels of violence to push it down sufficiently that a click registers; things like dragging icons or resizing windows, right-clicking and so on is therefore almost impossible. The touchpad has been this way for a few years now, and I'm not sure why it happened in the first place. I know for a fact nothing has been spilled or dropped into the chassis that could explain it, only thing I can think of is the battery beneath it swelling. Is this a common occurrence on MBPs of my age/generation? For that matter, are touchpad malfunctions such as this a common occurrence?