Fill a small container with 1 cup bleach and 1 gallon of water. Soak the sponge in the solution for five minutes. Remove the sponge and wring out the bleach solution. Rinse with warm water.

Materials Needed: Sponge, Concentrated chlorine bleach, Measuring spoon, Glass or plastic bowl, Warm water, Drying rack Step 1: Mix a solution of one-half teaspoon of concentrated chlorine bleach ...

I filled up a container with warm water and added a few pumps of dish soap. Then I dropped my sponge into the concoction, mixing it around to let the soap and water really settle into the material.