There are a few things you can do to clean ash off of your car. The first is to use a vacuum cleaner with the hose attachment to suck the ash up into the machine. The second is to use a bucket and pour water onto the ash and then put it in the bucket. The third is to use a cloth or paper towel and rub it all over the car. Finally, you can use an air compressor and blow out all of the vents on your car.
