A draft must of blew out the pilot light on my gas hot water heater. The directions on the unit don't seem to be of any help. They state to turn top nob to pilot position and then hold down the button for at least a minute and release. While I can get the ignitor to light, it will not stay lit when I release the pilot button. Does anyone know a good troubleshooting guide on properly lighting pilots for gas hot water heaters ?