Using the canards is easy. Just install them on the front bumper of your 2018 - 2021 Subaru WRX or STI following the included instructions. When installing, make sure they are securely attached to ensure maximum performance. As for maintenance, regularly clean the canards with a mild soap and water solution. Avoid using abrasive cleaners that could damage the carbon fiber surface. Also, check the mounting points periodically to ensure they are still tight. If you notice any signs of damage or wear, it's best to replace the canards to keep your vehicle performing at its best.