I'm noticing when taking a shower, a small but steady stream of hot water leaks from the faucet although I have fully engaged the handle to direct the water to the shower head. I've removed every knob and access panel, but see no way of making an adjustment so that ALL of the hot water goes to the shower head. Any ideas on a solution? I might be losing a gallon of hot water (more like two when my wife showers), so over a course of the year, it could be a considerable amount wasted. All the cold water goes through the shower head.