Printer streaks ruin documents and waste ink. The same horizontal or vertical lines appear on every page. The fix depends on whether you have an inkjet or laser printer. Each has different causes and different solutions.
I'll cover both. Start with the section that matches your printer type.
Run the printer's cleaning cycle (inkjet)
This is the first thing to try on an inkjet. Most printers have a built-in cleaning option. Common paths:
- HP – HP Smart app > Settings > Maintenance > Clean Printheads
- Canon – Printer settings > Maintenance > Cleaning
- Epson – EpsonNet Config or printer panel > Setup > Maintenance > Head Cleaning
- Brother – Control panel > Ink > Clean Print Head
Run the cleaning cycle once. Print a test page. If streaks remain, run it again. Usually 1-3 cycles clears 80% of streak issues. Each cycle uses ink so don't go past 3 without trying other fixes.
Manual print head cleaning (inkjet)
If automatic cleaning didn't work, clean the print head by hand. Remove the ink cartridge. The print head is either built into the cartridge (HP, Canon) or stays in the printer (Epson, Brother).
For cartridge-mounted print heads, dampen a lint-free cloth with distilled water (not tap). Wipe the metal nozzle plate gently. Don't touch the gold contacts. Let it dry completely before reinstalling.
For Epson and Brother models with permanent print heads, you can usually access them by removing the cartridges and looking inside. Same gentle cleaning with distilled water.
Check ink levels
Low ink causes streaks too, especially when one color runs out before others. Open your printer software. Look at ink levels.
Replace any cartridges below 10%. If you're using third-party cartridges, switch to official ones temporarily to test – sometimes generic cartridges cause streaks that official ones don't.
Inspect the cartridge contacts
The gold or copper contacts on the cartridge need to be clean for proper electrical connection. Remove the cartridge, look at the contacts. Wipe gently with a lint-free cloth.
If contacts are corroded or have ink residue, use a tiny bit of rubbing alcohol on a cotton swab. Let it dry fully before reinstalling.
Streaks on a laser printer
Laser printer streaks come from different causes. Common ones:
- Vertical streaks usually mean the drum or toner is failing
- Horizontal streaks often indicate a fuser issue
- Random faded patches mean toner needs shaking or replacing
- Same spot on every page means a scratched drum
For toner-related streaks, remove the toner cartridge. Hold it horizontally and shake gently side to side to redistribute toner. Reinstall. Print a test page.
Clean the laser corona wire
Many laser printers have a corona wire that gets dusty over time. Open the printer's front access panel. Look for a small green slider tab on the toner area.
Slide it left and right several times. This wipes the corona wire clean. Common on Brother and HP laser models. Refer to your manual if you can't find it.
When the drum is the issue
Drum units last about 25,000 pages on most laser printers. After that, they cause streaks. Look at your drum if the printer reports drum life remaining.
If less than 10% drum life remains, replace it. Drum units cost $50-200 depending on model. Replacing them is usually a single cartridge swap – pull out the old, push in the new.
When to give up on the printer
If you've replaced ink/toner, cleaned everything, and streaks remain, the print head or drum unit is permanently damaged. Cost of repair often exceeds buying a new printer.
Decent home inkjet printers cost $100-200 new. Decent laser models start at $150. Compare against the cost of replacement parts before paying for repairs.
What kind of streaks are you seeing – color band, single dark line, or random spots? Tell me and I'll point to the most likely cause.