Prentke Romich Company
http://www.prentrom.com/support/article/1561
Do not use sharp, pointed objects on the touch screen!
The touch screen scratches easily and can become permanently damaged.
This touch screen is designed to be used with a finger.
TIP: To use a stylus or a headstick, you must use one made specifically for a capacitive touch screen. Anything else will harm your touch screen and may cause your device to stop working.
For more Information, type “capacitive touch screen accessories” into your computer’s Browser to find out what is available.
Cleaning
The touch screen is very sensitive. Fingerprint smears, dust and grime, saliva, etc., will affect its performance. The screen also reacts to raindrops and extremes in temperature (condensation).
Use a lint free cloth like those that are used to clean flat screen TVs and computer screens.
Use a household glass cleaning product such as Windex™, or a cleaner made for computers and flat screen TVs, or rubbing alcohol. IMPORTANT NOTE: Do not use solvents or abrasives on your screen or your case.
Spray cleaner onto a lint-free soft cloth then wipe screen clean. Dry and polish the screen thoroughly using a second cloth. The polishing will remove any cleaner residue which may interfere with the effectiveness of the screen.
If the screen gets wet from rain, saliva, condensation, etc., clean and wipe it dry immediately.
NOTE: The touch screen is a liquid crystal display (LCD). Should the display break (unlikely except in extreme circumstances) and you come into contact with the liquid crystal, wash and rinse your skin thoroughly. Be careful to avoid splintered glass.