If you like to experiment and create safe household cleaning products, you may be interested in making your own magic sponges. To do mix 1 cup of baking soda with 1/2 cup of water to form a paste. Add 1/2 cup of liquid castile soap, stir, and pour into an ice cube tray. Let sit ( don’t freeze!) for 4 hours or until it solid. You’ll be ready to tackle those grimy areas! This is a fun project for kids too!