I have a 12 inch macbook and there is a weird issue with my screen. It shows a transparent version of an old app that was open on the screen even if the app isn't running (see photos). I think this is called ghosting based on some quick research, but I have no idea how to fix it.
Photos: https://drive.google.com/open?id=0B_fX5LKp7kZUUV9BTWZ4LWp6STQ
https://drive.google.com/open?id=0B_fX5LKp7kZUWFVSQmt3NnFsWFU
Photos: https://drive.google.com/open?id=0B_fX5LKp7kZUUV9BTWZ4LWp6STQ
https://drive.google.com/open?id=0B_fX5LKp7kZUWFVSQmt3NnFsWFU