HP Deskjet 6540 Color Inkjet Printer - Manual (Page 131)

1. Nozzle plate
Caution: Do not leave the print cartridges outside the printer for more
than 30 minutes.
Cleaning instructions
1. Lightly moisten a cotton swab with distilled water and squeeze any excess
water from the swab.
2. Wipe the print cartridge copper contacts with the cotton swab.
Caution: Do not touch the print cartridge ink nozzles. Touching the ink
nozzles will result in clogs, ink failure, and bad electrical connections.
1. Clean only the copper contacts
Repeat this process until no ink residue or dust appears on the swab that you
use to clean the contacts.
3. Insert the print cartridges in the printer, and then close the printer cover.
HP Deskjet 6500 series printers User's Guide
131