Letting my boyfriend use my Macbook has not been a good idea. Because of his heavy-handedness, the click button has become overly sensitive/sticky, meaning that the slightest click has turned into a double-click and sometimes even triple-click. This is causing major problems such as not being able to select files in Finder without opening them, closing something inadvertently, or opening three email windows at once when I hit "Reply." What's weirder is that windows are apt to minimize when the cursor is clicked nowhere near the minimize button. Selecting text in word-processor apps has become painful because of this, as you can imagine, and so has dragging and dropping. Basically there have been a slew of click-button issues including the opposite of what I described: it doesn't respond at all. Problem is, I'm totally out of warranty and don't have Apple Care and am broke enough to not want to take this in. Is there anything I can do myself to remedy the situation?