HP Officejet H470wf Mobile Printer - Manual (Page 78)

2. Clean the electrical contacts on the print cartridge cradle with a dry cotton swab.
3. Carefully clean the electrical contacts on the print cartridge with a soft, dry, lint-free
cloth.
CAUTION: To prevent damage to the electrical contacts, you should wipe the
contacts only once. Do not wipe the ink nozzles on the print cartridges.
4. Reinstall the print cartridges.
Chapter 5
74 Maintain and troubleshoot