Original post by: chfreeman73 ,
This happened with my lg g4 tonight after signing up for something that required lots of info. It freaked me out. Thinking I had been hacked especially after the memo opens and typed the words "stop smoking " then scribbled on red all over the page. I immediately did a factory reset. But it still continued. I removed the tempered glass which had a hairline crack for months. It still continued. I cleaned the screen with an alcohol wipe and ta da it stopped! Wish I would have tried this first.