Pixelink PPC15-CX Instruction Manual page 8

Cotton swabs - Cotton swabs moistened with rubbing alcohol are excellent
tools for wiping hard to reach areas in the keyboard, mouse, and other
locations.
  F oam swabs - Whenever possible it is better to use lint free swabs such as
foam swabs.
ESD PRECAUTIONS
Should the need arise for adding a functionality, observe all conventional anti-ESD
methods while handling the components contained within the LCD.
grounded wrist strap and an anti-static work pad is recommended. Avoid dust and debris
or other static-accumulating materials in the work area.
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PPCxx-CX Series Flat Panel PC
The use of a