If your printouts become grainy or blurry, or you see dark or light bands across them, you may need to align the print head.
1. Load a few sheets of plain paper in the sheet feeder.
2. Windows: Right-click the printer icon in the bottom right corner of your screen (the taskbar) and select Print Head Alignment.Macintosh: Open the Applications folder, open the EPSON Printer Utility 2, select Stylus CX4400, and click OK. Then select Print Head Alignment.