squeaky

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I bought a new mouse recently and it squeaked! It was cute for about an hour, then got really old.

It is a Microsoft Wireless Laser Mouse 6000 v2.0.  Generally, it feels a little cheap in the hand, but whatever.

Short version of fix: 

From the wheel button, trace the creavice between the buttons to the top of the mouse.  There is a tiny notch.  Press down hard.