Solution:
1. Turn off the water supply. The first step to fixing a leaky Moen kitchen faucet is to turn off the water supply. There is usually a valve under the sink that you can turn to shut off the water.
2. Remove the faucet handle. Once the water supply is turned off, you can remove the faucet handle. There is usually a screw or cap on the side of the handle that you can remove with a screwdriver. Once the screw or cap is removed, you can pull the handle straight off.
3. Replace the O-ring. The most common cause of a leaky Moen kitchen faucet is a worn-out O-ring. The O-ring is a small, rubber washer that sits between the faucet stem and the faucet body. To replace the O-ring, simply pry the old one out with a screwdriver and insert the new one.
4. Reattach the faucet handle. Once the O-ring is replaced, you can reattach the faucet handle. Simply align the handle with the stem and push it back on. Tighten the screw or cap to secure the handle in place.
5. Turn on the water supply. Once the faucet handle is reattached, you can turn on the water supply. Check for leaks around the faucet stem and body. If there are no leaks, the repair is complete.