Using this rear diffuser is a breeze. First, install the rear valance to your car using the provided bolts and nuts. Then, take the Flow - Lock diffuser fins and simply click them into the valance. They'll lock securely in place. Before installation, make sure your car's rear bumper area is clean and free of debris. When handling the diffuser, be careful not to scratch the textured ABS fins or the satin black valance. For maintenance, you can wash the diffuser with mild soap and water. Avoid using harsh chemicals that could damage the materials. Keep it in a dry place when not in use to prevent any potential damage.