HP 2 - Manual (Page 106)

if your printout has ink smears
Ink smears appear on the back of the printouts, or the paper sticks together.
do this
1. Open the Advanced Features dialog box.
2. Move the Dry Time slider toward More .
3. Move the Ink Volume slider toward Light .
The colors in the image may become lighter.
4. Click OK .
If the problem persists:
1. Remove the borderless printing media, then load plain paper in the In tray.
2. Press and hold down the Print Cancel button until the printer starts printing a
self-test page, then release the button.
3. Repeat step 2 until the self-test has no ink smears on the back of the paper.