Why is my LG G3 touch screen so erratic; pressing down on things on its own?

[AC Question]

Since yesterday my LG G3 has started to act up on its own. It hasn't been damaged or dropped. I also did a hard reset and the screen is "touching" on its own so badly that as soon as I started it up after the reset, it started to change languages and "touch" randomly. I cannot do a thing with it. Oh, and I also have taken out the battery and sd card and put them back in to see if it made a difference; no it did not.

 

[B. Diddy]

Welcome to Android Central! Does this happen only while charging, or also when unplugged? Any water exposure?