This is a very easy process. You will need several things to clean up the headlights
1. Plastic cleaner, you can find it at any automotive parts store
2. 00 steel wool. The very fine stuff.
3. Soap/water for clean up.
You just take the plastic cleaner and wipe the headlights down and use the steel wool to "buff" the area clean. Its not neccessary to use alot of pressure, unless the lights are not coming clean. Then just wash them clean and you'll be all set.