when i look at analogRead(a1) - (a3) i see ~900 - ~1000. how can i bring the other pins down?
I am going to assume that there is nothing connected to those analog inputs and you want them to read near 0 for open. Is that right? If so, a high value resistor (100K - 1M ish) from the analog input to ground will pull that input down when unconnected (open) but not significantly affect the reading when connected HIGH.