Washing your hands the right way also happens to save a lot of water.
You might think you know how to wash your hands, but most of us are doing it wrong, at least according to the CDC and some recent studies. A new faucet is designed to force us to do a better job: After you get your hands wet, it stops just long enough—20 seconds—for you to properly scrub with soap. Only then can you rinse. The faucet also automatically saves water, because it uses the exact amount you actually need.