Most drip problems are caused by a valve that is worn out or improperly installed. If the faucet drips when the water is off and the handle is in the hot position, then it is likely due to a worn-out stem seat washer. The stem seat washer is located inside the valve below where the stem comes through the body of the faucet. This washer can be replaced to eliminate any dripping problems caused by this worn-out part.