Using the APR Vortex Generator is quite simple. Just install it on your Subaru WRX or STI (2015 - 2021) where the roof meets the rear window. Make sure it's securely attached according to the installation instructions. As for maintenance, regularly clean it with a mild car cleaner and a soft cloth to keep it in good condition. Remember, this is a clearance item with some top - coat damage and chipping, so it's non - returnable. Avoid using harsh chemicals or abrasive materials during cleaning as they could further damage the surface.