What is the most logical next event?

How to clean car plastic
Vacuum the interior.
Before you begin, vacuum out your car to remove any debris. Your cleaning products will work much better if you vacuum before getting started.

Choices:
(1). To start, vacuum, just and use a suction tool. Where you vacuum will depend upon the make and model of your car, but you probably have to use either a microfiber upholstery brush or a square vacuum brush.
(2). Since cleaning the interior of cars like these can get complicated, it is good to use a vacuum cleaner. Clip on rubber, corrugated, and painted pieces of plastic on the outside of the car.
(3). Using a soft brush attachment on the vacuum nozzle will help prevent scratching. Remove the floor mats and shake them before you start vacuuming.
(4). Use a soft vacuum for seats, window coverings, and anywhere else you see spray streaks. A synthetic fiber vacuum made especially for car seats will not work best because it does not have to be vacuumed at all.
(3).