A dripping faucet isn’t just annoying — it can waste gallons of water. Luckily, you don’t need a plumber. Steps:

1. Turn Off Water Supply – Shut off valves under the sink.
2. Remove the Handle – Use a screwdriver or Allen wrench.
3. Inspect the Washer or Cartridge – Worn-out washers are the usual culprit.
4. Replace the Part – Take the old one to a hardware store for a match.
5. Reassemble & Test – Tighten everything back and turn on the water.