Original post by: Pierre Michael ,
Gregory, the tubing needs to be 'primed' when using for the first time. To make this easy, there's a dispense 10mL button in the UI when you go into the admin screen. With two button presses, you can prime the tubing so that there's no air. When a bottle runs out and you fill it or replace it with another bottle, you usually don't need to prime it again as long as no air bubbles have traveled up the tubing.