analogRead() with 5 resistance sensors

Projects General Guidance
5

  1. connect the sensors between analogue pin and ground.

  2. add a pull up resistor of about the same value of the sensor in the middle of it's range, between analogue pin and VCC (5volt).

  3. add a 10-100n capacitor between analogue pin and ground.

  4. read the sensor twice, to reduce any ghost charge from the previous pin reading.

All of the above, not just one.
And don't share sensor(s) ground with other grounds, e.g LEDs or LCD displays.
Leo..