The only solution to this issue is a full replacement of the screen. The colors, lines, and black blotches are natural when any digital screen is damaged. Some are more durable and don't have this and others get this by just by pushing on the screen to hard. The simple answer is you have to use a heat gun to heat the adhesive on the phone and use a suction cup plus a thin prying tool to remove the screen. Google or find on youtube on how to replace BLU vivo 5 screens as it will go more in depth and following my simple instructions will damage your phone. Considering how cheap this phone is, I feel it is not worth the cost of replacing just the screen so I would advise to just buy a new and different brand phone.