A device for preventing and clearing fouling on a side-view mirror includes a curved tube affixable to a vehicle having an inlet positionable facing forward in spaced-apart relation from the side-view mirror. An outlet is positionable facing the mirror's surface. An outer wall defines a lumen extending from the inlet to the outlet. The tube describes a partial “U”, with a rearmost portion of the tube extending generally rearward. Apertures extend through the wall adjacent the tube's rearmost portion, facing rearward. When the vehicle is moving forward, air is forced into the device's inlet and passes through the tube's lumen to exit the outlet, onto the mirror, preventing droplet buildup and fogging. The rearward-facing apertures channel moisture out of the tube's lumen, preventing additional droplets from impinging on the mirror. In an embodiment, a side window portion also provides for preventing and clearing fouling of a side window.