Barnes & Noble Nook HD User Manual page 18

Even on a day that is not very hot, the passenger compartment or trunk of a car can be extremely hot. Do not leave
your NOOK in a car.
High storage temperatures reduce battery life. For more information, see "Charging Recommendations".
Caring for the Touchscreen
You should clean the touchscreen on your NOOK from time to time. Clean the screen with a damp soft cloth, such
as a micro-fiber cloth. Micro-fibre cloths are available from Barnes & Noble stores and from partner retailers. Do not
use any chemicals to clean the screen.
18 Barnes & Noble NOOK HD User Guide