Using your Noble carbon fiber center AC vent trims is a breeze. First, pick the color that suits your style. Once you've got your trims, it's time to install them. Make sure the area where you'll put the trims and the trims themselves are at around 70 - 80 degrees. This helps the adhesive work better. Clean the area well, getting rid of any dirt or other stuff. You can use an alcohol pad if you want. Try fitting the trim on the vent to see how it looks. Then, peel off the backing from the adhesive and stick it on. Press down evenly to make it stick firmly. As for maintenance, just use a soft cloth to wipe the trims gently. Avoid using harsh chemicals as they might damage the carbon fiber finish. And that's all you need to know to keep your trims looking great for a long time!