Leaky faucets can be annoying. Here are some quick fixes you can try while waiting for a plumbing professional: Turn off the valve under your sink by turning the knob. Turn on your faucet to allow it to drain any remaining water. Remove the handle using a screwdriver. You may need to unscrew or pry up the handle. Remove the cartridge, also known as the stem. Visit your local hardware store to purchase a new one. Install the new stem and replace the handle. If you're not comfortable attempting this troubleshooting rip, reach out to one of our plumbers for service.