Do it with your own hand buddy, y to ask the driver, its your car after all .
In pushto we have a proverb that dont even kill a snake with other person's hand. but the prob is we want to roam around in clean shiny cars but dont want to clean it ourselves. 
In my opinion if you do it with your own hand and cover all the electronics properly, there is no chance of any mishap InshaAllah.
cheers