You’re wasting a ton of water
Except when you’re actively rinsing something, the ongoing stream of water from your sink faucet goes mostly unused.
As Jonah Schein, the technical coordinator for homes and buildings in the EPA’s WaterSense program, explained in an interview with The Washington Post: “In order to wash the same amount of dishes that can fit in a single load of a full size [energy-efficient] dishwasher and use less water, you would need to be able to wash eight full place settings and still limit the total amount of time that the faucet was running to less than two minutes.”
Yikes! While we’ve been known to speed clean from time to time, we’re not that good.