Apple MacBook (13-inch, Mid 2009) - Manual (Page 65)

Chapter 5 Last, but Not Least 65
Cleaning the MacBook screen To clean the MacBook screen, first shut down your
MacBook, unplug the power adapter, and remove the battery. Then use the included
cleaning cloth to wipe the screen. Dampen the cloth with water if necessary. Do not
spray liquid directly on the screen.
Understanding Ergonomics
Here are some tips for setting up a healthy work environment.
Keyboard and Trackpad
When you use the keyboard and trackpad, your shoulders should be relaxed. Your
upper arm and forearm should form an angle that is slightly greater than a right angle,
with your wrist and hand in roughly a straight line.
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