Screen Cleaning Mode - Dark Screen for Safe Visual Cleaning
Use a dark fullscreen cleaning mode to make smudges and dust easier to see before repeating a screen test.
Quick answer
Screen cleaning mode shows dark and muted full-screen surfaces so dust, fingerprints and smudges are easier to see before testing.
Method: ScreenTestKit generates the test surface in your browser. Results depend on visual inspection; the site does not read or diagnose physical panel hardware.
How to use this test
- Open cleaning mode before running pixel or uniformity tests.
- Use a suitable microfiber cloth and follow your device maker's cleaning guidance.
- Avoid pressure, excess liquid and harsh cleaners.
- Repeat the relevant screen test after the surface is dry.
What to watch for
- Dust that may look like dead pixels.
- Fingerprint smears that resemble cloudy patches.
- Screen protector bubbles or lifted edges.
- Marks that remain after gentle cleaning.
How to interpret results
Mark disappears
It was likely surface dust or a smudge, not panel damage.
Mark remains fixed
Repeat white, black and color tests to classify the issue.
Touchscreen device
Avoid pressing hard while cleaning; pressure can damage the panel.
Frequently asked questions
Does this lock the screen?
No. It only displays a cleaning-friendly surface.
Why clean before a dead pixel test?
Dust and lint can look exactly like tiny pixel defects.