I'm at the part with ghost where you shoot the tire off the of the plane and then you haft to kill helicopter with agent in it..... ok i shoot the plane just fine but when i start firing my Machine gun at the heli It Frezzys up ANYONE have any tips how to Wash the game or Any Tips How To get the scatches off......I heard that i need to take a quetip and use rubbing achol on the scatchs IS THIS TRUE????