just watch the video and your problems will be solved.....i tried pressing my home button 3 times but it didnt work for me so i kept on pressing my home button till the blue line disappeared.it took me 10 mins to make it disappear.
https://www.youtube.com/watch?v=TYd__OL_Ksw
https://www.youtube.com/watch?v=TYd__OL_Ksw