If you use an inkjet printer and see smearing on a page, it's typically because something is sticking to the printhead. If your printer includes the nozzles in the cartridges—as most HP printers do, for example—and you see smearing immediately after changing a cartridge, remove the cartridge and check to make sure the protective tape over the nozzles is completely removed. If some of the tape is still attached, remove it, being careful not to touch the nozzle plate.