HP Officejet Pro L7380 All-in-One Printer - Manual (Page 153)

6. Wipe the electrical contacts on the printhead but do not touch the nozzles.
NOTE: The electrical contacts are small copper-color squares, grouped on
one face of the printhead.
The nozzles are on a different face of the printhead. Ink will be visible on the
nozzles.
CAUTION: Touching the nozzles can cause permanent nozzle damage. Also,
ink can permanently mark clothing.
7. After cleaning, place the printhead on a sheet of paper or paper towel. Make sure
the nozzles are facing up and are not in contact with the paper.
Maintain the printheads 149