My new powerbook g4 screen has visible streaks when wet with a moist lcd cloth. They are not visible when the screen is dry or when the laptop is on. I do dont know what caused the streaks either. I have been using lcd wipes to clean the screen that I bought at best buy. I tried to remove the streaks with no success. What a real bummer. I should of bought the lcd wipes Apple recommended instead of the cheap ones I bought at best buy.