There may be a faulty electrical connection at the fuel tank that's exasperated by an influx of excessive moisture from the car wash. Inspect the electrical connector for the fuel pump at the top of the fuel tank for any presence of oxidation and make sure that it's secure.
To access the fuel pump, remove rear seat cushion. Turn the four retainers 90° in a clockwise direction and remove the fuel pump inspection hole cover. There you'll find the electrical connector.