Patedepollo

Leaky faucets not only are maddening, they skyrocket your water bill. In a single day, more water can be wasted by one leaky faucet than you’d normally use. It’s foolish not to make this simple repair immediately. All you need is a screwdriver (probably Phillips), an open-end wrench, a faucet reamer, and replacement washers. Before you buy washers, remove the faucet handle and stem to discover the type of washer needed. Some newer models take 0- rings.
Turn off the water at the main valve. Turn on the leaky faucet and let the line drain. Loosen the screw in the center of the faucet handle. If that screw is hidden under a decorative cap, carefully pry off the cap with a screwdriver.
Lift off the handle. Corroded handles may require some force to remove. If you must pry with a wrench or screwdriver, cover the handle and the chrome base with thick masking tape or a towel to prevent scratching.
Loosen the stem nut with an open-end or adjustable wrench. Lift the stem from the faucet assembly. That gives you access to the washers. Look for a thin black 0-ring around the stem or a black neoprene washer attached to the bottom of the stem by a screw. Remove the old washer or 0-ring and go buy a new one just like it.
Before you restore the stem to the faucet assembly, inspect the metal faucet seat (down in the fixture) for corrosion. Clean out any you find with a faucet reamer. Failure to do this results in another leak before long.
Reassemble the faucet. Turn on the water. Open the faucet and bleed air from the water lines until water flows smoothly.