Yes, toothpaste can be used to clean car headlights. You can clean the car headlights by following the steps below.
1. Spray water on the lampshade, and wipe off the dirt with a soft cloth.
2. Spray water again and evenly spread the toothpaste on the lampshade.
3. Wipe carefully and rinse with water.
4. Polish the headlights after cleaning, wipe the headlights with a chemical synthetic polishing agent, and wax the headlights.