Corrupt downloads, malfunctioning applications, unexpected app problems, and iOS flaws, in general, might all be to blame for your iPhone's touchscreen becoming slow or entirely frozen. These circumstances generally have an impact on the iPhone's software functionality, resulting in the aforementioned symptoms. It's conceivable that an iPhone won't be able to launch a certain program or file because it's corrupted. A similar issue might arise as a result of applying a defective update. The update appears to have screwed with the iPhone's usual functionality, causing it to cease operating, freeze, or become unresponsive. Minor software issues like these are frequently resolved by rebooting the device, however, there are certain circumstances when the major cause is resistant to this procedure.

In certain circumstances, display issues such as a sluggish or unresponsive touchscreen are linked to memory concerns such as an iPhone with inadequate memory. Running and adding additional material to a device with insufficient memory space can cause performance challenges, which are frequently reflected by display failures. This is most likely the situation if you have a large number of multimedia files stored on your device. Any device can run out of capacity over time, and you'll need to take steps to free up additional space so you can load more material and apps without experiencing speed difficulties.

Adjusting the 3D touch settings on your iPhone 6s might also aid in the resolution of touchscreen difficulties. Many iPhone users were able to resolve the issue using this solution. This might be a viable answer in your situation, so you should give it a shot and see what happens. Take the following steps: