Hi hun,
I was told to stop sterilising around 6 months or when bub is picking up things off the floor, being in contact with germs etc. I sterilised until DS was 7 months old because we went to China for 4 weeks, but when I came back I didn't anymore. I also used to be pedantic about sterilising dummies, but since DS was about 6 months I stopped. As with the water, the MCHN told me to use tap water from about 6 months, but I started doing that when I stopped sterilising so around 7 months. Hope this helps and GL!
B .