Spraying a tornado with water would not have any meaningful effect on the tornado itself. Tornadoes are massive, rapidly rotating columns of air that are associated with severe thunderstorms and can have wind speeds exceeding 300 miles per hour. The amount of water you could spray would be minuscule compared to the intense energy and scale of the tornado.
In addition, tornadoes are primarily driven by atmospheric conditions, including temperature, pressure, and humidity. Introducing water into a tornado would not alter these conditions in any significant way. Moreover, the water would quickly evaporate in the extremely low-pressure environment of the tornado.
In summary, while the idea of spraying a tornado with water might seem interesting, it would have no practical effect on the tornado or its behavior.