the easier way or removing the comdensation is to remove both high and low beam bulb carrier assemblies and leave the housing right in there, then blow compressed air in to get the water to come out. Then do as solardon said, the filters are probably plugged, or full of moisture. They grab condensation from the Air conditioning system, as they are directly piped to the top of the HVAC box in the car. Make sure your A/C drains are clear.....that will give you this issue as well, and it's very common to have at least one drain plugged, often by the tranmission tunnel heatproofing blocking the drain tube on DB7 Vantage.....