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Remove the cap cover from the top of the faucet handle that is causing the  leak. The small common screwdriver may come in handy here to remove the cap.  Next, using a screwdriver remove the screw that holds the handle to the faucet  valve stem. Once the screw has been removed, use a wrench to unscrew the nut  that secures the faucet valve stem to the faucet. Now, using pliers, pull the  valve stem out of the faucet. This may require a little tugging. Once you have  removed the valve stem, you should see a rubber washer sitting on top of a  small spring in the valve stem housing located in the faucet. 
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