How to Fix Lines on Epson XP-7100 Scans (Even After Cleaning the Glass & ADF)

Question: I cleaned the glass, ADF, and document bed multiple times, but I still get lines on my scans. How can I stop the lines from showing up?

I'm scanning on an Epson Expression XP-series printer (XP-7100 style). No matter how many times I clean the scanner glass, ADF area, and document bed, I still see lines running through my scans. What else could be causing this, and what can I do to fix it?

Answer: 

Step 1: Identify where the lines are coming from (this matters)

The XP-7100 and similar Epson Expression models can scan in two main ways:

1. Flatbed scan (document placed on the big glass bed)

2. ADF scan (document feeds through the top Automatic Document Feeder)

Here's the key diagnostic trick:

• If lines appear only when scanning through the ADF, but flatbed scans look clean → the issue is usually the thin ADF scan strip (a narrow piece of glass) or something touching it (ink/adhesive/scratches).

• If lines appear on both ADF scans and flatbed scans → the issue is more likely on the main scanner glass, the scan sensor, or (less commonly) internal calibration/firmware issues.

Quick test (super effective)

• Scan the same paper once using flatbed, and once using ADF.

• Compare results:

  • Lines only on ADF = focus on ADF strip area

  • Lines on both = focus on main glass and internal causes

Step 2: Why cleaning "the glass" sometimes doesn't work

Most people clean the obvious glass surface correctly-but scan lines persist because the culprit is usually one of these:

1) The "ADF scan strip" is the real problem (most common)

Even if you cleaned the bed, the ADF uses a very narrow scanning window-a thin strip of glass (or plastic window) off to one side, depending on model design. A speck you can barely see can create a long vertical line across the entire scan.

What to do

• Find the narrow strip used for ADF scanning.

• Clean it again, but slowly and with strong lighting (phone flashlight at an angle helps).

• Use a microfiber cloth with:

  • Glass cleaner, or

  • 70-90% isopropyl alcohol (lightly applied-never dripping)

Extra tip: If the line is perfectly straight and repeats in the same exact position every scan, that's classic ADF-strip contamination or damage.

2) Residue, streaks, or "invisible film" (common after repeated cleaning)

Sometimes repeated wiping leaves a film from cleaner, oils, or paper dust. That film can refract light and cause consistent lines.

What to do

• Clean once with alcohol to remove oils/film.

• Then do a final pass with a dry microfiber to remove streaking.

• Avoid paper towels-they can leave lint or micro-scratches.

3) Scratches or etched marks on the scan glass/strip (very common in ADF use)

Staples, gritty dust, or rough paper edges can scratch the ADF strip. A scratch behaves like a permanent "dirt line" because it distorts the sensor reading every time.

How to confirm

• Shine a flashlight across the glass at a low angle.

• Look for a hairline scratch exactly where the scan line appears.

What can help

• If it's a minor mark, sometimes cleaning plus a different scanning method (flatbed) is your workaround.

• If the strip is scratched deeply, the true fix is usually replacing the strip/glass assembly (model-dependent).

4) The white backing strip (or white reference area) is dirty

The scanner needs a clean white reference area for calibration. If the white strip under the ADF lid (or backing pad) has dirt/ink, you can get lines or shading.

What to do

• Open the ADF lid and locate the white backing strip/pad.

• Clean it gently-don't soak it.

• Make sure it's fully dry before scanning again.

5) Dust inside the scanner (less common, but real)

If dust gets inside the optical path, cleaning the outer glass won't touch it.

Signs

• Lines persist after thorough cleaning of glass + ADF strip + white backing.

• Lines may look faint, blurry, or "shadow-like," not crisp.

Reality check
Internal dust removal often requires partial disassembly, and it's easy to cause more problems if done blindly.

Step 3: Settings that can make lines look worse (software-side)

Even when hardware is the root cause, certain settings can exaggerate the appearance of lines:

• High DPI (600-1200) can make faint streaks more visible

• Text enhancement / sharpening can "pull out" lines

• Auto contrast can turn subtle streaks into bold bands

Try this

• Scan at 300 DPI

• Turn off "Enhance," "Sharpen," "Auto Document Fix," or similar options (names vary by Epson software)

• Test using Epson Scan 2 (if available for your setup) versus your OS built-in scan tool

Step 4: About error codes

In your question, you didn't mention any Epson error codes (for example, scanner errors, ADF errors, or code-style messages). If you're seeing any specific scanner-related code or message on the printer screen or in Epson Scan (even something short like a "scanner error" number), that can point us toward a sensor/connection/calibration issue rather than just glass/strip contamination.

Addressing printer issues can be a complicated affair because the problems are so hands-on and depend heavily on what we can physically inspect and test. Because of that, we're not able to provide remote troubleshooting, suggestions, or support for printer repairs. We do offer an in-person evaluation and repair service through our local diagnostic facility: Printer Repair Service (https://bchtechnologies.com/printer-repair-service). Due to high demand, we run on a first-come, first-served basis, and it can take a few weeks before we're able to accept a drop-off. Our services are structured to repair either a whole printer or specific parts, with clear instructions on how to proceed. We also recognize our rates aren't the most economical, so we strongly recommend self-help through online research. A great starting point is YouTube-especially our channel homepage: BCH Technologies on YouTube (https://youtube.com/@bchtechnologies). Use the search icon near the "About" area on the right side of the menu bar to find videos by topic. I receive dozens of messages every day asking if there's a video for a specific issue, and after nine years of making videos it's tough to remember every single one-so YouTube search is the fastest method. Plus, YouTube may recommend other helpful videos from other creators as well.

Thanks again for reaching out and for supporting our work-especially on YouTube. I truly appreciate it, and I hope the steps above help you narrow it down quickly and get clean scans again.