Have you replaced any of your pump parts at all? In particular, the valve membranes can get microscopic tears that can affect the suction.
You're still getting within the 'nomal' range if you're getting 2-3 ounces per pumping session.
If you're planning on continuing to nurse, she's actually getting more solids than we would normally recommend. If baby fills up on solids, she'll nurse less (even if the frequency is the same), which will reduce your supply. At 6 months, I would recommend one meal at most a day...and by 'meal', we're talking a tablespoon of food.
I agree with the pp about replacing pump parts. Those membranes seem trivial but make a difference and should be replaced every few months. They are very cheap relative to the other parts.
I sometimes have a hard time with letdown and of course the more you try to "relax" the more stressed you get! I always have a hard time when my toddler is making noise, distracting the baby who is nursing, and I can't get into the nursing "zone."
I actually replaced the white membranes memorial day weekend.
Do you have any moisture in your tubes? I had some trapped in there and could tell it impacted suction and I bought new tubes. The new ones made a difference for me, but mine had already been through one year of pumping for my first son
Another thing you can try is just devote your weekends or days off to lots and lots of nursing and some extra pumping sessions. Try on those days to pump on one side while you nurse on the other.
If your supply has been dropping that is a good way to boost it.
Hey sorry to thread-jack, but Cathy, where did you purchase the new tubing?
I had a hard time finding them but found them on Amazon. They were about $10. Search for "Medela tubing" and you should find them.
I was also grossed out and could not stand that wet suction sound. I also figured it was not clean to have moisture trapped in there for so long. I had tried everythign to get the moisture out.
The new tubing also has better connectors to the bottles that seem to fit better.