For the past week I've had a major dip in pumping output and couldn't figure out why. I have been taking Fenugreek and Blessed Thistle, added pumping sessions, and anything else I could think of. I figured out it wasn't a supply issue because DD could nurse and was happy - finally got a tip that it might actually be my PUMP.
Anyway, I called Medela's customer service line today and after troubleshooting we figured out that the faceplate had come loose on one of the three key points where it needs to snap. Instantly went from pumping one ounce to 4.5 ounces with that snap.
Wanted to throw this out there in case anyone else ever finds themselves with the same problem!