DIAGNOSIS Screen protector interference or a failing capacitive touch sensor. Many users apply thick aftermarket screen protectors.
FIX Remove any third-party screen protector. Use only the included one. Clean the screen with a dry, soft microfiber cloth. Static or moisture on the screen can disrupt the capacitive field.
IF THAT DIDN'T WORK The unit may have a defective digitizer. There is no field repair. Contact Emerson support for a warranty replacement if under one year.
HEADS UP Never use liquids or cleaners on the screen. Do not press with sharp objects. The glass can crack.