Check to make sure all of the bulbs are seated correctly......if they are not then u will see what ur seeing. If these are the HID headlights, check the rear cap VS980 4G ?
Well you probably need to dry inside of the lens out with the bulbs removed and left in the sun or with a hair drier blowing warm air into the lens. Normally all headlights have a small vent tube to allow trapped moisture to escape. Sometimes these vent tubes become homes for wayward spiders which clog them up. Other than these ides, assuring the bulbs are seated properly, look for any physical damage to the exterior of the lens itself (e.g. rock chip, crack etc.).