We would like to inform you if the display contains any water drop or sweat then the device touch will work abnormally. To avoid this issue clean your device screen properly and use Samsung approved screen protector.
Kindly follow the below mentioned steps to resolve the issue:
1. Perform Interactive checks through the Samsung Members Application (Samsung Member > Get Help > Interactive checks > touch screen).
2. If still issue persists, kindly visit nearest service center for physical inspection of your device. Service center personnel will provide you the further resolution.
Follow the link mentioned below-
Team Samsung Members