Over time, the headlight glass loses its transparency. From the sun they become yellow, from stones and sand - matte. And then there are three ways to correct the situation. Buy a new headlight - expensive, polish the old one - energy-consuming and you need a polishing machine.  The last option remains - the simplest and most effective. An electric device directly on the headlights is supplied with steam from a special liquid and the glass acquires former transparency. The device works from the cigarette lighter 12V. The set includes two bottles of liquid 30 milliliters each, it is recommended to cover the headlights with sandpaper before steam treatment.