Top 10 Unusual Car-Washing Tips Published on June 22, 2018 in Top 10 by The Car Guide Photo: Pinterest 1. Toothpaste for polishing headlightsA surprising way to polish your car’s headlights and taillights is to use toothpaste. That’s right! Just make sure it doesn’t contain a whitening agent or hydrogen peroxide. Once again, do small circular motions with a microfiber cloth or even a toothbrush. Wipe the headlights with a dry cloth when you’re finished.