<human>:  What is the best way to clean a car upholstery?
<bot>: The best way to clean a car upholstery is to vacuum it with a brush attachment to remove loose dirt and debris, followed by spot-cleaning any stains with a mild detergent and a damp cloth. For tougher stains, a specialized upholstery cleaner may be necessary. Allow the upholstery to air dry completely before returning the seats or other upholstery to the vehicle.