Usually aft every use when I'm home but I use the fridge hack at work as there's no time to wash and sterilise. But for this I'll limit to 2-3 uses. So far my 6 mo baby has no digestive issues. I think if ur baby is 3 months and below, best to sterilise aft every use.
Personally I sterilised after every use. Some mums put the parts in the fridge and sterilise after a few uses, but I didn’t want to take the risk. My kids had no tummy issues throughout my pumping period.
After every use will be the best
after every use
after each use
after each use