I asked my hv this as I was trying to sterilise everything and he said you don't sterilise your boobs when bf so just wash the teethers, its only really bottles that need sterilising as milk is full of bacteria and their are lots of bits on a bottle hard to clean, everything else can just be washed in hot soapy water. I sterilise his dummy once a week but wash it when he's about to use it which isnt often as he doesn't like it! His teethers and toys just get a wipe or a wash and he's been fine with them