A stamped concrete driveway can be tricky to clean, because the decorative grooves in the designs tend to collect debris. The first step to cleaning your stamped driveway is to wash it with a pressured garden hose, or any type of pressurized water cleaning gun. As long as you have maintained your clear sealant, this water cleaning should not damage the concrete. For the more difficult debris that gets trapped in the grooves, or for difficult stains in your driveway, you need to use a special concrete driveway cleaning solution and a brush. You can purchase the cleaning solution from any home improvement store.