Don't Sad for your unresponsive iPhone screen-- Just Fix it!
Many iPhone users have met problems that the iPhone touch screen won't respond to your instructions, and they'll feel panic and sad. In fact, please don't sad for this issue, it's easy to fix. If you are interested in this, you can repair it by yourself at home without iPhone repair tools.
1. Make sure ycour iPhone screen is clean.
Sometimes, some dirty stuff is covered on the screen, when you touch it with your finger, there is bad connection,so the iPhone screen won't response or deferred response. Please use a medical cotton ball or cleanroom wiper to clean the screen slightly.
2. Reset 3D Touch Settings
Check and reset the 3D Touch sensitivity settings. Go to Settings > General > Accessibility > 3D Touch and adjust the sensitivity slider.
3. Restart iPhone
Restarting the iPhone is the most common solution to fix the problem which caused by software. Please press and hold the Sleep/Power button until the red slider bar appears, tap it to close iPhone, and then press and hold iPhone power button again till the Apple LOGO appears on iPhone screen.
4. Maneage the iPhone Storage
As we know, if the iPhone doesn't have enough storage space, it will cause iPhone runs slowly, even stuck. Please force close or quit all running apps, delete unused photo, document and video. Or you can go to Genaeral - iPhone storage to check the iPhone storage space, and you can uninstall some some apps that occupy large memory but are not used frequently.
5. Reset iPhone
Hold both the Sleep/Power and Home buttons simultaneously for about 20 seconds until the Apple logo displays. This trick has been used to deal with several software-related issues occurring on various iOS devices.
6. DFU restore iPhone
DFU restore iPhone will erase all datas on your iPhone, this deepest way for fix your iPhone. Before your restore iPhone, please back up it. Use C48 MFI Lightning Cable to connect your iPhone and PC, and then use iTunes to restore it.