Hello, i have had my 50" 720 Panasonic plasma since 2013 from new and recently i have noticed a strange problem with it. The edge of the screen seems to periodically, like every few minutes or less, have this weird flicker/twitching problem where you can actually see the edge of the screen jerk for a moment likes its moving in and then out really fast. It only happens for a second and does this again randomly every few minutes or less. Any idea what the issue could be? I've checked the cables and all seems good but i did just until recently start vaping inside so maybe the vapor got into the electronic somehow? I don't know.