touch screen not working perfectly on iphone 6

I don't know whether it has been caused because of iOS 10 or not. I was in 9.3.5 earlier and then upgraded to version 10.0.2 exactly and then I started noticing touch screen issues. Let me bring an example to clarify this, such as, I went to settings panel and then started hitting getting back on the "top left corner" but it stopped responding while rest of the screens touches seemed so good. I found same sort of issue on both "top left/right corner" and can't figure out what is causing this problem. Any solution to that ?