I installed this faucet 6 months ago and it was working as advertised. The faucet is connected with electric power so batteries dying is not a problem. All of the sudden 6 months later the sensor stopped working as it was. Now it only works randomly which is very annoying. i have been trying to find troubleshooting directions to no avail. I can hear the control box clicking but the water doesnt shut off if running or open if close. Any ideas how i can fix this problem. This makes this faucet worthless