When you are breastfeeding and pumping with the Medela Symphony , Pump-In-Style, or Freestyle breastpumps, you want to make sure that you carefully clean all of your pump parts after every pumping session. (If you don't have access to water and a sink after each session, you can use the Medela Quick Clean Wipes to clean as much as you can during the day, and then do the full water cleaning when you get home.) After each time you pump: 1. Detach the breastshield connectors and your bottles or storage bags from your tubing. Keep the tubing attached to your pump, and allow your pump to run for a few minutes to help get rid of any humidity or condensation in your tubes. It's great to do this while you're storing your breastmilk (fridge, freezer, etc) 2. Once your milk is stored, take apart all of your pump parts. Make sure that you disassemble the valve , the membrane , the PersonalFit connector , and the PersonalFit breastshields so that you can clean in all ...