Using these DTC Tail Light Tint Overlays is a breeze. First, clean the surface of your tail lights to make sure there's no dust or dirt. Then, carefully peel off the backing from the overlay and align it with your tail light. Press it down firmly to make sure it sticks well. When it comes to maintenance, just use a mild soap and water solution to clean the overlays every once in a while. Avoid using harsh chemicals or abrasive materials as they can damage the overlay. And remember, don't try to install these overlays in extremely cold or hot weather as it might affect the adhesion.