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10.5 Manually cleaning print cartridges
If the printer is used in a dusty environment, a small amount of debris might
accumulate inside the case. This debris can include dust, hair, or carpet or clothing
fibers. When debris gets on the print cartridges and cradle, ink streaks and smudges
might appear on printed pages. Ink streaking is easily corrected by manually
cleaning the cartridges and cradle.
Gathering cleaning supplies
You will need the following items to clean the print cartridges and cradle.
• Distilled water
• Cotton swabs or other soft, lint-free material that will not stick to the cartridges
Be careful not to get ink on your hands or clothing as you clean.
Preparing to clean
1. Press the Power button to turn on the printer, and then raise the printer cover.
The cradle moves to the center of the printer.
2. Disconnect the power cord from the back of the printer.
3. Remove the print cartridges and place them on a piece of paper with the nozzle
plate facing up.
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.
HP Deskjet 3840 series printer User's Guide
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