Method 1: Restart Your iPhoneWhen iPhone 6s touch screen does not work and then is not responding, you can press the power button always and keep it. When your screen appears the slide to open option, slide it to close your iPhone 6s. When it is closed successfully, press the Power button to open the smart phone. If this method does not work, try to use other ways.
Method 2: Forced to restart iPhone 6sAnother possible reason about iPhone 6s is not responding is that the Home button and Power botton are not responseless. If you met this problem, please press "Home+Power" at the same time and keep pressing. Until the screen appears the white Apple logo, it means that your iPhone 6s is forces to restart. Just loosen your fingers and then wait for it to start the phone, and then your iPhone 6s will be okay. If you met the serious problem all of the sudden, even to press "Home+Power" at the same time does not work, you have better plug in it to a charger. And then press Home and Power at the same time again, and finally forced to restart iPhone 6s.
Method 3: Update iOS system in iPhone 6sMethod 1 and Method 2 is only to deal with temporary problem. If you want to solve it thoroughly, you have to wait for Apple to optimize its iOS system. Therefore, once you figure out the new iOS update, just update the iOS.
Method 4: Use Recovery ModeIf your iPhone 6s is not responding, try to connect it to iTunes and use the recovery mode to restore your device. You can make use of Tenorshare Reiboot to do that. This is a freeware to help you enter and exit recovery mode. About how to use it you can follow it as below.
Step 1: Download Reiboot software from official website and then install it your computer.
Step 2: Connect iPhone 6s to the computer and then open Reiboot to run the application. Then you can see the whole interface, which is easy to understand.
Step 3:Click the Enter Recovery Mode and then close boot it again. After that, click Exit Recovery Mode to finish it.