@ JacobChrist: I have tried that and it works to an extent, the problem is once the surface tension is broken I can't seem to get it to stop slowing. I am about to try making the surface tension stronger by adding salt to the water, I really hope that this does it!
@ pantonvich: I have a s trap in the tube from the supplying syringe to the lower dam. It has helped but not completely. Are you saying the motor would then screw the threaded rod into the nut to close, and out to open? I am not sure this would be fast enough as the purpose is for the water drops to collide. But nice idea 
Thanks!