Step-by-Step Guide:

1. Turn Off the Water Supply

• Look under the sink for shut-off valves and turn them clockwise to stop the water.
• If no shut-off valve exists, turn off the main water supply.
• Open the faucet to drain any remaining water.

2. Remove the Faucet Handle

• Use a screwdriver to remove the screw holding the handle (it may be under a decorative cap).
• Lift off the handle carefully.

3. Disassemble the Faucet

• Depending on the faucet type (compression, ball, cartridge, or ceramic disk), you may need to remove a retaining nut or screw.
• Use an adjustable wrench to loosen and remove these parts.

4. Inspect and Remove the O-Rings & Washers

• Look for worn-out or damaged O-rings and washers in the faucet assembly.
• Use a small flathead screwdriver or needle-nose pliers to remove them.

5. Clean the Faucet Components

• Soak all parts in white vinegar to remove mineral buildup.
• Scrub with an old toothbrush for stubborn deposits.
• Rinse with water and dry thoroughly.

6. Replace the O-Rings and Washers

• Coat the new O-rings and washers with plumber’s grease for a better seal.
• Install them in place of the old ones.

7. Reassemble the Faucet

• Reinstall the faucet components in reverse order.
• Tighten screws and nuts carefully to avoid over-tightening.

8. Turn the Water Supply Back On

• Slowly turn on the water and check for leaks.
• If leaks persist, ensure all parts are seated properly and tightened.

This should stop the leak and restore proper function to your faucet!