Symptoms
- Same dark spot or smudge appears in the same location across photos
- Spot doesn't move when you recompose the shot
- More visible against bright or plain backgrounds
- Wiping the lens often removes it
Likely causes
- CommonFingerprint or oil smudge on the lensEveryday handling easily transfers oils from fingers onto the lens.
- CommonDust or lint stuck to the lens surfacePocket lint and dust can settle directly on the lens cover.
- PossibleDebris trapped under the lens cover glassIf cleaning the surface doesn't remove it, the particle may be sealed underneath.
- Less commonDead pixel or sensor artifactA sensor defect can rarely produce a consistent dark spot regardless of lens cleaning.
What to do
- Wipe the lens gently with a clean, dry microfiber cloth and take a test photo.
- If a case is used, remove it and check for lint or debris trapped around the lens cutout.
- Try a soft, dry, unused toothbrush to gently clear debris from the edge of the lens.
- Take photos of a plain white or gray surface to make the spot easier to see and confirm it's gone after cleaning.
- If the spot remains after thorough cleaning, it likely is under the glass or a sensor issue.
Tools and parts
- Microfiber cloth
- Soft dry toothbrush
When to call a pro
See a repair shop if the spot remains after thorough external cleaning, since it may be trapped debris or a sensor issue.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.