Abstract: A cleaning device for a sieve box is provided. The cleaning device can include outer members configured together to form a perimeter, a central region located within the perimeter and interior members connecting the perimeter and the central region. The cleaning device can include nubs provided on the bottom surface of the outer members and the interior members. The nubs can be spaced apart across the lengths of the outer and interior members and can include terminal ends. The terminal ends of the nubs can have rounded, flattened or pointed shapes based on the intended aggressiveness of the cleaning device. The cleaning device can be adapted for placement on a sieve screen of the sieve box and move across the sieve screen to remove milling product stuck to the sieve screen, break apart clumped milling product, and/or push excess milling product toward a discharge zone of the sieve box.