Protect suede from the sun's rays. Frequently vacuum the material as well. Brush suede lightly with a nylon brush or with an ultra-light abrasive paper (such as a 400-grit sandpaper).
To treat shallow stains, rub a small amount of hydrogen peroxide or ammonia half diluted with water with steel wool pad. Remove all traces of the solution with clean water, but avoid using too much water to prevent further staining the suede. Then, wipe the suede with a dry cloth. Warning: It is recommended to wear gloves when handling ammonia!