I always sterilise
I sterilise my pump parts once a day. When LO was newborn to around 6/8 weeks old I would do a full sterilisation of the parts and bottles, and then every time after that a rinse and a quick soak in boiling water. Now I just sterilise them once a day and rinse them throughout the day. LO is almost 6 months. I use the tommee yippee microwave steriliser, and sometimes the fred and Flo cold sterilising tablets if they’re soaking. Breast milk IS sterile but bacteria can still get into your pumps and bottles from other things.
Following because I had no idea that pump may not need to be sterilised??? 😭😭