My CHN said she recommends formula feeding mums sterilise bottles until 12 months. She said that the bacteria found in formula is not the same as everyday household bacteria and can be bad for bubs. She said if you use bottles for EBM then soap and water is fine as breast milk does not contain the bacteria.

She also suggests reading the dummy packaging as apparently some dummies say not to steam sterilise, I think it can weaken the rubber or something.