Hi D.!
With my first born child I sanitized EVERY bottle, nipple, pacifier and all EVERY time after they were used! That took ALOT of time, but I was convinced I was doing the best for my child son.
With my second child, however, he wasn't so lucky :0) I sterilzed once a week, at first, and he was fine. Then we went on a cruise which wasn't the "best" kind of water to use for cleaning.....and he survived that as well!
Anyway, I discovered that as long as those nipples and bottles were cleaned somehow, everything would be ok!
I found out it was most important to sterilize during/after he was sick. Then EVERYTHING including was sanitized!
This question was fun for me, because it remind me of how hard I made things for myself with my first born. Those sweet little babies can take just about anything, regardless of their parents! :0)
Enjoy!
:o) N.