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Cleaning the touchscreen, Touchscreen disable/enable key – Juniper Systems Allegro CE Manual User Manual

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Hardware Features Page 2-13

Cleaning the Touchscreen
Disable the touchscreen before you wipe it off or clean it to avoid
inadvertently making selections on the screen (see instructions
below). Use a clean cotton cloth to gently wipe off the screen. Do not
use anything abrasive that could scratch the screen (including tissues
and paper towels).

Note: petroleum-based cleaners and solvents should not be used. They can
damage polycarbonate.

Touchscreen Disable/Enable Key

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The touchscreen key disables and enables the touchscreen. Press the
BLUE shift key and the TS key to disable the screen. Once the screen
has been cleaned, use the same key sequence to enable the
touchscreen.