Agree with all mommies,  u should clean it with good cleanser like Pigeon, luvlap,  I'm using mee mee and dismental the bottle parts and boil it for at least 10 minutes.

You can dip in boiling water 

yes... clean bottles using bottle cleaners from pigeon or luvlap...then put the bottles in water... boil it til bubbles , wait for one or two min... remove ...store bottles in dry clean dust free place... clean and sterilize after every <u>use</u>

yes... firstly wash the bottles with bottle cleanser...and then in a <u>vesse</u>l&#160; boil water...and boil the bottles in water for atleast 15 mins...

bottles should be properly boiled... cleaned with brush n stored in fridge