How do I fix a dripping kitchen faucet?

Concerns & risks

Drip. Drip. Drip. The kitchen faucet keeps ticking away all night. You've cranked the handle tighter, but it still drips, and you can practically hear the water bill growing.

A dripping faucet wastes water and leaves stains in the sink.

Causes & evidence

Worn seals or a worn cartridge inside the faucet let water seep through. Leak facts: household water leaks.

What to do

1. Turn off the shut-off valves under the sink. Plug the drain so screws don't escape.
2. Pop off the decorative cap and remove the handle screw.
3. Pull out the cartridge (note its orientation; photo it!).
4. Take it to the hardware store, buy the identical one, reinstall in the same orientation.

Common mistakes: Over-tightening the handle can damage parts. Before you take anything apart, shut off the water under the sink and plug the drain so small parts don't vanish. Take photos as you disassemble. Bring the old cartridge to the store to match it. Mismatched parts are the classic return trip.

Speed Man tip: Find the faucet brand and model first. Many brands send replacement cartridges under warranty.

Wrap-up: Drips usually mean a worn cartridge or seal. Shut off water, remove the handle, swap the cartridge. Check the brand warranty for free parts.