do you have the zip drip hooked up correctly? Mine doesn't drip at all and at the moment its running two double head mist nozzles? should be connected like this
from reservoir you should run the line into a T connector where it straight lines to the pump and the zip drip comes off the other end of the T. The line coming into the zip drip should be the return line from the last nozzle in your connection, so basically the water does a circle. Reservoir > pump > out to first nozzle > continues on to other nozzles > back to zip drip