Clean all the ink off the silk screen. Use a pressure washer if you have one.
Mix a solution of equal parts household bleach and water.
Pour the bleach solution onto the surface of the silk screen.
Scrub lightly with a nail brush or soft-bristled scrub brush and let sit for five minutes.
Scrub the entire surface on both sides.
Rinse with water.
Repeat until all the emulsion is removed.
Hold the screen up to a window or bright light and tip to view it at different angles.
Scrub until it's clean no matter at which angle you view it.
Allow to air dry fully before storing.