Using this spoiler is a breeze. First, make sure you have all the hardware that comes with it. Clean the area on your car where the spoiler will be installed to ensure a good fit. Align the spoiler with the designated spots on your vehicle and use the included hardware to secure it tightly. As for the brake light, it's already installed, so you don't have to worry about that. When it comes to maintenance, regularly wash the spoiler with a mild car soap and water. Avoid using harsh chemicals that could damage the paint. Also, check the hardware periodically to make sure it's still tight. If you live in an area with extreme weather, like heavy snow or salt on the roads, give the spoiler an extra cleaning to prevent corrosion.