Inkjet printers push ink through tiny printhead nozzles. When ink dries in those nozzles, printouts show white lines, missing colors, streaky text, or broken patterns. The first fix is usually the printer built-in nozzle check and cleaning cycle, not taking the printer apart.
Does this affect you?
Use this guide if an inkjet print has gaps, horizontal white lines, missing colors, or incomplete text after the printer sat unused or ran low on ink.
Run a nozzle check and cleaning cycle
This is the manufacturer-recommended path and it uses some ink each time.
- Load plain paper.
- Open HP Smart, Epson Printer Utility, Canon IJ Printer Utility, Brother software, or the printer touchscreen maintenance menu.
- Choose Print Nozzle Check Pattern or similar.
- Compare the pattern with the on-screen sample. Broken lines or missing colors indicate a clog.
- Run Clean Printhead or Head Cleaning.
- Print another nozzle check. If gaps remain, repeat cleaning once or twice, then wait before trying more.
Deep clean or soak stubborn clogs
Use these only after normal cleaning fails two or three times.
- Run Deep Cleaning or Power Cleaning once if your printer offers it. This uses significantly more ink.
- If the printhead is built into a removable cartridge, remove the cartridge and inspect the contacts and nozzle plate.
- Wipe the nozzle plate with a lint-free cloth dampened with distilled water. Do not use tap water.
- Set the cartridge nozzle-side-down on a damp paper towel for 10 to 15 minutes, then reinstall and run another nozzle check.
- If the printhead is a fixed internal part, such as many Epson models, do not remove it yourself. Use spaced deep-clean cycles or contact the manufacturer.
More control
Print regularly
Printheads clog fastest when ink sits still. A small test page every couple of weeks keeps ink moving.
Do not run cartridges dry
Printing after a cartridge is empty can overheat or dry the nozzles. Replace ink when the printer reports low rather than waiting for totally empty output.
Ink quality matters
Poor third-party or refilled ink can clog more often if the ink consistency is wrong. If clogs return repeatedly, try genuine or higher-quality cartridges.
Know when cleaning will not fix it
A failed printhead will not recover no matter how many cleaning cycles you run. If the printhead is replaceable, a replacement part may cost less than a new printer.
Sources
- HP Support – Clean the printhead (2025)
- Epson Support – Print head nozzle check and cleaning (2025)
- Canon Support – Cleaning the print head (2025)