My pressure switch stopped working the other day so I got in the well pit and tapped on it as I had in the past to re-start it. This time the spring in one of the contacts fell out, so I went and got a new switch and installed it. After 6 day's we had no water again so I went out and tapped on the switch again, it started working right away, but 5 minutes later it did the same thing, does anyone know what is causing this and how to fix it?