How to compare print quality before and after cleaning

Your printer has streaks, missing lines, or uneven color, and you want to know whether a cleaning cycle helped. A change in paper or print settings can make the next page look different even when the printer itself has not improved.

Use the same test page and print conditions before and after cleaning. TooLab’s Printer Test Page includes color blocks, gray steps, lines, and text, so you can compare several common print problems at once.

Compare the print before and after cleaning

1. Open the Printer Test Page and print it using the printer you want to check. Use your browser’s print dialog to choose the printer and paper size.
2. Keep the settings consistent. Use the same paper, paper tray, orientation, scale, color mode, and print quality for both sheets. If you change a setting, note it so you can repeat it later.
3. Inspect the first page before cleaning. Look closely at the color blocks, gray steps, thin lines, and small text. Write down where you see gaps, stripes, smears, or faded areas, and keep this sheet as your baseline.
4. Run one standard printhead or nozzle cleaning cycle from the printer’s maintenance utility. The name and location vary by printer. Do not run several cycles in a row unless the printer’s instructions recommend it.
5. Wait for the printer’s maintenance cycle to finish. If its instructions specify a pause before retesting, follow that timing.
6. Print the same test page again with the same settings and paper. Place the two pages side by side in similar lighting and compare the same areas.

The Printer Test Page gives you a consistent pattern to inspect, but it does not automatically compare or score the sheets. Keep the first print so you can judge changes directly instead of relying on memory.

What the result means

Missing lines or color gaps are smaller

The cleaning may have cleared a partially blocked nozzle. A nozzle is a tiny opening that puts ink onto the paper. If the second page is better but still has gaps, follow the printer maker’s recommended cleaning and retest procedure rather than repeating cycles rapidly.

The same lines are missing after cleaning

The cleaning did not fix the problem. The ink may be low, a cartridge may not be seated properly, or the printhead may need attention. Check the printer’s ink or toner status and its maintenance instructions before trying another cleaning cycle.

Color blocks look streaky, but text and lines look normal

This can point to a color ink supply or nozzle problem, but it can also come from choosing a different color mode or paper type. Confirm those settings match on both prints. A test page checks output consistency, not whether the printed colors are an exact match to the colors on your screen. See why color profiles change the look of a printer test.

Smudges or repeated marks remain

Smears, spots, and marks that repeat down the page may come from the paper path, rollers, or excess ink rather than a blocked nozzle. Head cleaning may not help. Check for damp, curled, or unsuitable paper and consult the printer’s instructions for cleaning accessible parts.

The second sheet looks different, but not clearly better

Check whether the print dialog changed the scale, media type, quality, or color setting. These can change how dense or sharp the print appears. If the settings match and the same defect remains, treat the cleaning as unsuccessful rather than judging by one darker or lighter patch.

What to try if the print has not improved

1. Match the print settings. In the browser print dialog, confirm the same printer, paper size, orientation, scale, and color option. On Windows 11, check Settings › Bluetooth & devices › Printers & scanners, select your printer, then open Printing preferences if available. On macOS, open System Settings › Printers & Scanners, select the printer, and check its available options.
2. Use the printer’s own maintenance utility. Look for a standard printhead or nozzle cleaning option in the printer’s screen or software. On Windows 11, maintenance options may appear in the printer’s preferences or driver utility. On macOS, check System Settings › Printers & Scanners › [printer] › Options & Supplies for a Utility option, if the printer provides one. Names vary by model.
3. Check ink or toner and cartridge seating. Look at the printer’s status screen or software. If you recently replaced a cartridge, make sure it is fully installed and that any protective seal was removed as instructed.
4. Print a nozzle check or alignment page. If your printer offers these maintenance checks, use them to narrow down the cause. A nozzle check shows whether particular ink channels are blocked; an alignment check can help when lines or text look shifted.
5. Try the recommended wait, then retest. Some printers need time for ink to settle or for a cleaning cycle to finish. Follow the manufacturer’s guidance, then print the same test page again without changing settings.
6. Stop if repeated cleaning makes no difference. Cleaning uses ink, and repeated cycles may waste it. If the defect stays in the same place after the recommended procedure, check the model’s service guidance or contact the manufacturer.

When the printer may need repair

If the same gaps, streaks, or marks appear on several test prints after the recommended maintenance, the issue may be a worn or blocked printhead, a faulty cartridge, or a problem with the paper path. A removable cartridge may be replaceable, but an integrated printhead can require service. If the printer is under warranty, contact the manufacturer before taking it apart. For an older printer, compare the repair cost with replacing it.

Make the comparison fair

Let each page dry fully before comparing it, especially if it uses inkjet ink. Use the same room lighting and view the sheets at the same distance. If the test is in black and white, use the same black-only or grayscale setting on both prints. A comparison tells you whether output changed under those conditions, not whether every printer setting is calibrated correctly.