1. Although some people think sponges are unsanitary and therefore unsafe, people have been using them forever without ill effect.
2. Sponges are less wasteful and save more money than disposable cleaning cloths.
3. Disinfecting a sponge uses less energy, water, and time than washing reusable cloths.
4. Trying to get rid of all germs in the home - if that's possible - isn't healthy. Our bodies need exposure to less malicious germs so they can build up better resistence. Too, some bacteria is actually good for our bodies.
5. Sponges are easy to sanitize. The Soap and Detergent Association says all you need to do is put them in a mixture of 1 quart water and 3 tablespoons bleach, let them soak for five minutes, then air-dry. Microwaving a wet sponge for 1 minute or placing the sponge on the top rack of the dishwasher and running it through a cycle also removes more than 99 percent of bacteria, according to most sources.