It depends on the material of your car mats. Some car mats are specifically designed to be pressure-washed or hosed down, while others are more delicate and require gentle hand washing.
Rubber or vinyl car mats are the easiest to clean and can often be washed down with a hose or pressure washer. However, be careful not to use too high of a pressure setting, as this can cause the mat to warp or lose its shape.
On the other hand, carpeted car mats require more attention to detail when cleaning. These mats are more prone to staining and may require gentle hand washing with a mild soap and water solution. Carpeted mats should not be soaked or hosed down as this could cause the water to soak in and create bad smells or mold growth.
Always check the manufacturer's cleaning recommendations for your specific car mats before using a hose or any cleaning products.