How to make my iPhone 6 stop splitting in half every once and a while?

How to make my iPhone 6 stop splitting in half every once and a while? - 1

Stop buying iphones.

This happens when you double tap the home button without pushing in. The Touch ID can tell that you are touching the home button with out pressing it in and it makes the screen do that to make it easier to reach the top part of the screen.

You could stop double tapping the home button or you could go into the Settings> General> Accessibility> and turn off Reachability.