Fix a dripping faucet

Steps

1. Close both stop valves under the sink and open the faucet to drain the line.
2. Plug the drain so small screws cannot escape.
3. Pop the handle cap, remove the screw, and lift the handle off.
4. Pull the cartridge with pliers and take it to the store to match.
5. Grease the new O-rings lightly, reassemble, then open the valves slowly and check for drips.

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