I use a Pari eRapid and I manually pause it after every inhale. Otherwise salt mist spreads around the room and triggers my air purifier to go into overdrive. No one told me to do this but I figure I should get as much of the saline as possible into my lungs. I also hold my breath a second or two or three before exhaling into the air, not the mouthpiece. Sometimes I can see salt mist in my exhalation, sometimes not; the longer I hold my breath, the less mist comes out, which I assume means more has been absorbed into my lungs. Then I put my mouth back on the mouthpiece, press the button, and inhale again.