Using the APR Vortex Generator is easy. Just follow the installation instructions that come with the product to attach it properly to your Subaru WRX or STI. When installing, make sure the surface is clean and dry to ensure a good fit. As for maintenance, regularly check the generator for any signs of damage or loose parts. If it gets dirty, you can gently clean it with a mild soap and water solution. Avoid using harsh chemicals that could damage the carbon fiber material. Also, keep an eye on the generator after driving on rough roads or in extreme weather conditions to ensure it's still in good shape.