Using these tail light overlays is super easy. First, mix a drop of dishwasher soap with water. Use this solution to clean and wet both the overlay and the tail light. This will help you place the overlay in the right position. Gently put the overlay on the tail light and use your fingers to squeeze out the water. Be careful not to damage the overlay while doing this. After that, let it sit for 24 hours. This gives it enough time to stick firmly to the tail light. Once it's completely dry, you can take your car through an automatic car wash or use a power washer without worrying. For maintenance, just wash it regularly when you clean your car. That way, your tail light overlays will keep looking great and protect your tail lights for a long time.