HP 510 - Manual (Page 50)

Precautions
Handle HP ink supplies with care. In particular, the printhead, which is a high-precision device, must be handled
carefully.
CAUTION: Do not touch, wipe or attempt to clean the printhead nozzles . This can damage the printhead.
• Do not put the printhead down on the nozzles.
• Do not be rough when handling the printheads.
Always set them down gently.
• Do not drop the printheads. Proper handling will
assure optimum performance throughout the
printhead life.
• Do not touch the end of the ink cartridge that is
inserted into the printer as there may be a small
amount of ink on the connection.
• Avoid storing partly used ink cartridges on their
ends.