Everyone prefers sitting in a clean car to a dirty one, so I have a very simple tip to clean the whole inside of your car. First, open every car door to make it easy to remove the objects. Second, take all of stuffs away from the cab in order to protect them from water and foam. Third, spray water into the cab as hard as you can. Fourth, put a lot of foam and then rub and rub with a rough sponge until you are satisfied. Finally, spray pure water again to rinse. Your cab can be totally cleaned by these five simple steps.