I have been working on an automatic watering system using 3 capacitive sensors with G, Vcc and Signal wires. I have tried assigning these sensors to various combinations of analog ports on an arduino nano. No matter which ports I connect the sensors to, when I try to read each port, I find that the resulting values are affecting each other. I'm running on the 5 volt rail, common ground. Has anyone had similar problems and found a fix?