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-fibre cloth. Micro-fibre cloths are available from NOOK retailers. Do not use any chemicals to clean the
screen.
18 NOOK HD User Guide