what does a blown out bulb look like? the headlight on my blaster worked for like 10 seconds then shut off so right now im soaking the bulb socket in baking soda with water and its cleaning it, and the light bulb has like a grayish bubble spot on the side of it and the inside of the bulb has like a black heat streak on the glass, and the wires that hold the spring on the inside of the bulb are black, is it blown?