Car washes aren't acceptable

Car washes aren't acceptable
The time it takes is good but it seems like the blowers at the end don't work because they give you the car with lots of water. So when water dries it leaves spots on your car. And they don't wash the back of your car. I know the car washes are free when you buy a car there. But if they aren't going to provide an acceptable service perhaps they should throw something else when you buy a car.