Best way to remove black dried moss

Have tried many methods, chlorine, toilet cleaner, even powdered cement.  Best method: get it wet. When dried, the moss is hardened and solid, probably a self preservation.Soak the area in water,  keep it wet at all times for two to four days. The moss is now vulnerable to a simple garden hose.  Avoid chemicals which would damage your garden.  Dish soap is less harmful and loosens the soil Cleaned only with a garden hose

Have triสกลนคร Sakon Nakhon