A headlight cleaning device for vehicles such as automobiles, tanks, and aircraft so that the operator is assured of optimum light transmission and illumination of the vehicle. This includes reservoir tank means for containing a fluid for cleaning and spray nozzles aimed directly onto the lens of each headlight to clean them off, the nozzles being adjustable to give an initial sharp spray to dislodge the dirt, and a later if desired, cleaning spray to sluice off the dirt so that the lenses are cleaned off. Automatic light sensing means are provided to sense the light output of the lens and to turn on the cleaning spray when the light output falls below the predetermined level of lumens.