Using these splash guards is easy. First, gather all the included hardware and 3M tape. Clean the area on the rear bumper where you'll install the guards to ensure a good bond. Then, carefully align the guards with the pre - drilled holes on your car. Use the provided hardware to secure them in place. If you have any trouble with alignment, the 3M tape can help hold them in position while you fasten the bolts. When it comes to maintenance, a simple car wash will do the trick. Just use a mild soap and water to clean the guards. Avoid using abrasive cleaners as they may scratch the surface. Also, keep in mind that if you had rear spats or certain mud flaps installed previously, you'll need to modify them to fit these new splash guards. Check the alignment of the guards regularly, especially after driving on rough roads, to make sure they're still securely attached.