['97ventureowner]

I'm not familiar with the Neon headlamp system so I don't know if you can remove the headlamp capsules from the vehicle. If you can you can try a mild soap solution poured into the empty capsule (light removed) and swish it around and rinse. Once it's dry you can re-install it.That sometimes works on vehicles where you can remove the headlights. I see this problem a lot on many different vehicles, GM , Ford, and Chrysler products It is caused by the sun's UV rays deteriorating the plastic and yellowing it. The problem gets worse as the vehicle gets older. You might have to replace the lenses or capsules. Sources for these are salvage yards, eBay and your local dealer. I'm beginning to think that these will eventually be considered "normal wear items" that will need replacing sometime in the vehicle's lifetime.