SCRUBBLADE offers the industry’s most unique design that features two rubber blades with individual functions. The leading blade loosens bugs dirt dust pollen and bird droppings containing hundreds of raised triangular ridges to help loosen the debris while the inside trailing squeegee blade sweeps away remaining residue and moisture. rubber blades with individual functions. The leading blade loosens bugs dirt dust pollen and bird droppings containing hundreds of raised triangular ridges to help loosen the debris while the inside trailing squeegee blade sweeps away remaining residue and moisture.