Exterior wall textures may accumulate dirt, dust and environmental debris over time. Periodic cleaning to remove debris should suffice as exterior wall textures do not require significant maintenance.
Harsh chemicals or abrasive cleaning agents can damage the texture and the paint, so ensure you clean them with water and mild detergents. Use a soft brush or a sponge for cleaning to prevent any damage to the textured surface. Pressure washing, if necessary, should be done with care to avoid dislodging the texture.