Lexus LS460 2008 Owner's Manual page 242

3-1. Using the touch screen
To avoid damaging the touch screen
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Touch the screen lightly with your finger. If there is no response, remove your fin-
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ger from the screen and try again.
Remove any dirt on the screen by wiping with a soft cloth. Do not use detergent.
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When using the touch screen
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If the screen is cold, the display may be dark, or the system may seem to be
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operating slightly slower than normal.
The screen may seem dark and hard to see when viewed through sunglasses.
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Change your angle of viewing, adjust the display on the "Display" screen, or
remove your sunglasses.
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