DS is 9 months old, and I pump three times Monday through Friday while at work. Lately I've been having to turn the suction WAY up in order to get anything out. I thought for sure something was wrong with the pump (PISA), but when I called Medela the CS rep suggested that I might be acclimating to the pump and therefore need to turn it up more.
So, what to do? Is there anything that can be done aside from buying a different kind of pump?
(I changed the membranes, and do compressions. I have two sets of equipment and have the same trouble with both, so there shouldn't be anything wrong there. I cleaned the diaphragm and checked that the cover plate was attached correctly. Anything else I should try?)