We live in Southern California and water use is always an issue. I use a local automatic car wash about every ten days. It's the brush type. After I drive through, I jump out and towel off the few spots that are still dripping and inside the door frames. Every so often, I use the same car wash, but allow their guys to do the inside and quick detail of the outside.
About every two months I do the DANG black plastic stuff that always looks like crap and 303 the BacFlip tonneau cover. One of the toughest things to keep looking nice is the black plastic hood scope. I fixed that by adding a carbon fiber unit and carbon fiber vent covers to the front fenders.
The only pain in the butt now is the rear tailgate piece and bumper. I tried Cerakote on these recently, it lasted longer than other black plastic products, but is expensive.
About every 4-6 months, I do all the inner fender wells while detailing the other black plastic products.
Edit.....Just went out and detailed it.