Panasonic Toughbook CF-74JCL02AM Reference Manual page 6

Touchscreen
Maintaining the performance of the touchscreen
When the touchscreen becomes dirty, wipe it with an approved soft cloth
The touchscreen is specially treated to prevent dirt from adhering to the surface, so dirt can be removed easily using a dry
cloth (use only the approved soft cloth). If the dirt does not come off easily, breathe on the surface and try again.
Do not apply water or solvents to the soft cloth.
Clean the touchscreen while the computer is powered off
Cleaning the screen while the power is on may cause the computer to malfunction. Also, dirt on the touchscreen is easier
to see when the computer is powered off, and so is easier to clean.
Wash the soft cloth when it becomes dirty
When the soft cloth becomes dirty, wash it with mild detergent. Do not use bleach or fabric conditioner (softener), or try to
sterilize the cloth by boiling.
If the soft cloth is dirty, it may be ineffective in cleaning the touchscreen, and in fact may cause dirt to adhere to the touch-
screen.
Check the following to prevent the surface of the touchscreen from being scratched
Are you using your finger or a stylus to operate the touchscreen?
Is the surface clean?
Is the soft cloth clean?
Are you using the stylus with the tip extended?
Is the tip of the stylus clean?
Is your finger clean?
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