Answer first: clean and isolate the screen before moving to restart, apps, and hardware
Touch problems can come from moisture or dirt, screen protectors and cases, a frozen app or OS, or physical damage. Start with low-impact checks and avoid a factory reset until simpler causes are excluded.
Separate likely causes by symptom
| Symptom | Check | Interpretation |
|---|---|---|
| Wet/dirty screen | Dry and clean the display | Surface condition may be the cause |
| Only bad with protector/case | Temporarily remove it | Isolate thickness, lift, or edge interference |
| Only one app is affected | Update/close the app and retest | App-specific issue |
| Whole phone is affected | Restart and check OS updates | System-level issue |
| Started after drop/liquid exposure | Stop forcing input and seek official repair | Possible hardware damage |
Check one low-impact condition at a time
- 1Dry and clean the screen and your hands
- 2Temporarily remove the screen protector, case, and attached accessories
- 3Restart or use the model-specific forced restart procedure
- 4If only one app is affected, test after updating or restarting the app
- 5Check OS updates and free storage
- 6If the issue follows a drop, liquid exposure, or cracked display, move to repair
Avoid changing several conditions at once; retest after each change so the cause remains identifiable.
When to move to repair or official support
- The issue began after a drop, pressure, or liquid exposure
- It persists after restart, updates, and accessory/environment checks
- There is overheating, odor, port damage, battery swelling, or another safety concern
Treat erase/factory reset as a later option only after backups and account recovery paths are confirmed.