So it looks like the lenses on the headlights are starting to get a bit cloudy. Has anyone been successful with cleaning these?

 

I don't want to walk out to my X308 just right now to check, if my X308 headlights are plastic or glass...
If the headlights are glass, I have no explanation. If they are plastic, here's the remedy:
https://www.jaguarforums.com/forum/s...er-kit-263728/

PS: If you were to take a picture at daylight with the headlights switched off, we could probably see more...

 

The X308 headlights are all glass. You have to carefully remove the head lamps one at a time. Use compressed air to blow any debris out of them while holding the glass facing up so the debris can fall out easier. Place the glass face down on a folded up towel so it’s spongy and spray glass cleaner or any other cleaner that doesn’t leave a residue inside the lamp. You can use a wire coat hanger, I used long hemostats to clamp down on a paper towel and was careful to not bend, displace or damage the metal light bulb cover or scratch the inside of the lense. This is a tedious and time consuming job but it does need to get done about every 5 years.

 

And do not touch the reflector surface by in any means. It is instant scratch even with just basic skin touch. Dust should not get in to the headlamp? There is vent of course. But still.

 

I can confirm above: "do not touch the reflector surface by in any means" - but for a different reason: When you touch the reflector surface, you transfer fat from your hands onto the reflector. Later, when in operation, the reflector surfaces gets heated up big time by the extremely hot bulb. The fat will evaporate and "come down" evenly on the whole reflector (the same is obviously true, when you touch the bulb). And that evenly distributed fat on the reflector makes the reflector dull and the light output of the headlights will be severely deminished.

 

Thanks for the advice all. I'll give it a try.