For dry/powder formulas, gently glide your eyeshadow brush over the Black Shadow Switching Sponge in a circular motion to remove pigment; move on to your next color.
For wet/cream formulas, dampen the White Shadow Switching Sponge and place back into the center tin to keep the water secluded. Gently glide your brush over the white sponge until pigment is removed; move on to your next color.
To clean: Remove sponges from the pan and wash with a makeup brush cleaner. Squeeze out all pigment and water. Lay flat to dry before returning sponges to pan.