This type of leak is often caused by scratched or torn o-ring on the cartridge or spout.
First, it is essential to identify the model of your faucet. Please view our Find Your Product section to determine your model.
For non-pullout or non-pulldown faucets:
This issue should be resolved by replacing the o-ring(s) inside of the spout, as well as the cartridge. The number of o-rings inside of your spout will vary depending on the model. It is essential to identify the model of the faucet in order to obtain the proper Moen service kit with the correct spout o-rings for your model; and different models utilize different sizes of o-rings. When replacing the o-rings, clean the inside of the spout and the outside of the valve body. We also recommend lubricating the spout o-rings with silicone-based grease (Moen part number 99915, included with o-ring kits). Do not use plumber's grade faucet grease, silicon sprays or any lubricant that may contain petroleum. Petroleum based lubricants may react with the rubber seals and could cause the spout to become difficult to operate. Also, the correct cartridge will need to be identified and replaced.
For pullout or pulldown faucets:
Replacing the appropriate cartridge for your model of faucet should resolve the issue.