Waterless car cleaning products are a useful tool to have if accessing mains water is difficult, and can produce a good finish in a short amount of time. However, they will struggle to produce the standard achieved with water, a good shampoo and more sophisticated products. It's also important to note that without being able to rinse the car off before, during and after the process, there is a higher risk of scratching the paintwork when wiping the product off, so taking care when using them is crucial.