Contact service center for repair/replacement.Disassemble the screen assembly (for advanced users only).Solution 2: Remove the screen protector.Solution 1: Disconnect the charger/cable.
With the intro and the disclaimer out of the way, let's try to understand what this 'ghost touch' problem really is and how it affects the usage of your phone. Especially if the underlying cause is a hardware issue. At the outset, let us warn you that while the ghost touch issue can be caused by several external factors that normal users like you and me can fix by simple troubleshooting, there may be some cases wherein a visit to the service center is inevitable.