Using your Special Edition C - Cut Tail Light Overlays is easy. First, wash your hands and make a soapy water mixture with just one drop of dish - wash soap and some water. Clean the area where you'll put the overlay and about 6 inches around it. Then, put the soapy mixture on the back of the vinyl. This helps in two ways. It stops the vinyl from sticking to itself, which is great if it's windy outside, and it also stops it from sticking right away to the tail light. Start by aligning the bottom part of the overlay and work your way up to the top. The water gives you some flexibility. You can lift the vinyl and move it around until you're happy with where it is. When you're satisfied with the position, use your fingers to push out the water and air bubbles. As for maintenance, keep the overlays clean. You can use a mild soap and water to wash them. Avoid using harsh chemicals as they might damage the material. If you notice any dirt or debris, clean it off as soon as possible to keep the overlays looking great.