I think my Uno R3's "Analog In" pin 0 is faulty (possibly pin 1 aswell).
I've tested each Analog In pin by connecting it with a jumper wire to: nothing, Gnd, 3.3V and 5V.
I used the File -> Examples -> 0.1Basics -> ReadAnalogVoltage sketch (changing which pin to read) to get the following values.
Is there any hope for the A0 pin? Do I need to buy another Uno?