How do you have them set up? One thing I learned with mine that the seller did not tell me is that they won't work in a vacuum. There has to be some vent for air to get in. I failed when I tried them at first because after they put out a few drops of water, no more was coming out so the chicks lost interest. Once I poked a vent in my container, it went really quickly. So if you have yours in some container that doesn't let any air in, try making a vent hole somewhere. I have 2 nipples on a 5 gallon bucket with a snap on lid and I just leave the top unsnapped on one side. It keeps dirt and stuff out but lets a small amount of air in which keeps the thing working great.