What causes my Moen single handle kitchen faucet to leak a small amount of water below the swivel spigot (spout ) when I turn the water off?
you can probably take handle off and tighten down on it and it will quit - if not replace rubber washer ! if its moen its got to be good ! no problem
Rubber gasket is prob. shot. So check manual and replace gaskets.
Replace the washers. It will only get worse. Most likely two washers. Just use the right size