i just push it down from top to bottom slowly...I decided I'm buying a dropper today and seeing exactly how much comes out at a full pump, pumped fast and slow. Also going to mark off on the bottle where a half pump truly is, based on how much comes out- not whats "halfway down" on the actual pump.I'll post my findings to this highly scientific endeavorTo get 1 pump do you press down to the first stop or first and then second stop?