Ghost touches near a cracked corner: how to check

Your phone or tablet opens things even when you are not touching it, and the problem seems to start near a cracked corner. Or taps around the crack miss while the rest of the screen responds. A quick test can show whether the browser is receiving touch input when your fingers are away from the screen.

Use the Touch Screen Test on the affected device. It shows touch points and dead zones, which can help you record where the problem happens. The test cannot confirm that the digitizer, the layer that detects touch, is physically damaged, but it can help separate phantom input from missed taps.

Test the cracked corner

1. Open the Touch Screen Test on the device with the cracked screen. Use the same browser and device where the unwanted touches happen.
2. Touch the screen in a few places, including each corner and the area beside the crack. Move one finger slowly across the screen and watch whether the test shows a touch point along its path.
3. Lift your fingers completely and set the device on a stable surface. Watch the test area for several seconds. Note whether a touch point appears, moves, or disappears without you touching the screen.
4. Repeat the check after rotating the device. If possible, make one pass with the case or screen protector removed and another while the device is unplugged from its charger.

Do not press hard on the damaged area. If the glass is loose or sharp, stop handling the device and use a repair service instead. A crack can spread, and loose glass can cut your fingers.

What the result means

A touch point appears while your hands are away

The browser is receiving input even though you are not touching the display. If the point repeatedly appears near the crack, the damage may be affecting the touch sensor, but a case pressing on the screen, moisture, a charger, or a software problem can also cause phantom input. Repeat the test after the quick checks below before deciding the screen is faulty.

Touches register only when you touch the screen

The test did not catch an unwanted touch during that short check. It does not rule out an intermittent fault, especially if the problem appears only while charging, after the screen warms up, or when you hold the device a certain way. Repeat the test when the symptom is happening.

The corner misses taps but does not create extra touches

This looks more like a dead zone: an area where the screen fails to register your finger. Try several slow passes across the corner and compare them with the same movement elsewhere. For more on a missing response in one part of the screen, see how to find dead spots on a touchscreen.

The problem stops when the case or charger is removed

The screen may be under pressure from a tight case or protector, or the fault may be related to charging. If touches return when you remove one accessory, leave it off and test again before using it. A damaged charging cable or adapter should not be used.

How to fix it

1. Remove pressure from the screen. Take off the case and any screen protector that is lifting, cracked, or pressing against the damaged corner. Do not peel away glass that is loose or sharp. If the symptom stops, replace the accessory rather than forcing it back into place.
2. Clean and dry the display. Turn the screen off and wipe it with a soft, lint-free cloth. Water, sweat, oil, and grit can interfere with touch input. Do not spray cleaner directly onto a cracked screen or let liquid seep into the damage.
3. Test without the charger. Unplug the device and check whether phantom touches continue. If they stop, try a known-good compatible charger and cable. Stop charging if the screen or battery area is hot, swollen, or visibly damaged.
4. Restart the device. A restart can clear a temporary software problem. After it starts, open the test again and check the same corner before launching other apps.
5. Check touch-related accessibility settings. On iPhone, review Settings › Accessibility › Touch › Touch Accommodations if you have changed those options. They can change how taps are recognized, though they do not repair a damaged screen. Android menu names vary by maker, so look under Settings › Accessibility for touch or interaction options. On Windows 11, check for device updates at Settings › Windows Update › Advanced options › Optional updates. On macOS, check System Settings › General › Software Update. Most Macs do not have built-in touchscreens, so an external touchscreen may also need its maker's driver or software.
6. Install the phone's system updates. On iPhone, open Settings › General › Software Update. On Android, look under Settings › System › Software update, although the path can differ by manufacturer. Retest afterward. An update may resolve a software issue, but it cannot repair cracked glass or a damaged touch sensor.

When it's the hardware

If touch points keep appearing in the same area when your hands are away, or the corner consistently fails to respond after you remove the case, clean the screen, unplug the charger, and restart, the display assembly may be damaged. The glass and touch sensor can be affected even if the picture still looks normal.

Back up important data while the screen is still usable. If the crack is spreading, glass is lifting, or the device is making unwanted taps that could send messages or delete things, stop using it for sensitive tasks. Contact the manufacturer or a reputable repair shop to ask about a screen replacement. A browser test can show the symptom, but only a physical inspection can confirm what part needs repair.

Why a crack can cause two different problems

A screen can have a dead zone, ghost touches, or both. A dead zone means your finger's touch is not detected in part of the display. A ghost touch means the device reports a touch you did not make. Cracks can disturb the sensor differently depending on where the damage runs, so a screen may miss taps at the corner while also registering false input nearby.

The test records what the browser receives at that moment. It cannot see inside the display, measure the pressure on the glass, or guarantee that an intermittent fault will appear during a short check. If the symptom is occasional, note when it happens and repeat the test under those same conditions.