Do I need to wash the car when returning it? Is there a car wash at the gas station ?

Car surface does not need to be washed, interior should be kept clean and tidy. Smoking is not allowed in the car, otherwise the service fee will be very expensive.

Most large gas stations have automatic car washes. Just insert coins.

Try not to wash the car. Just clean up the garbage inside. Otherwise, when you return the car, they will check it carefully and think there is something wrong.

Don't need to wash, but can slightly tidy up by yourself, as long as it's not too dirty

The UK doesn't know, but based on my experience of renting cars in Europe, Australia, New Zealand, and North America, it should not be necessary. Don't be too dirty, a little bit of dust is okay. Remember to take away the trash in the car. The most important thing is that I have never seen anywhere to wash the car.

Don't wash the car.