Dec 10, 2018· 7 Fascinating Ways to Use Charcoal in Your Home. December 10, 2018. ... Charcoal traps impurities found in water (industrial waste, chemicals, pesticides, etc). That’s why it’s recommended for use in homes where water quality isn’t the best. ... Just grind up a piece of charcoal, put it in a bowl, and moisten your toothbrush.