My Macbook touchpad has recently started making a very odd clicking sound whenever I lightly touch or click with it. It's almost if it's "popping" back into place. I've taken out the battery of my Macbook and had a look around and nothing seems to be wrong, but I have a feeling it might be because a screw needs tightening. Has anyone else had this problem and know the solution? [UPDATE] This is temporarily fixed (for about 5 minutes) by blowing really hard under the touchpad.