Hello doctor.I am having 6months old baby.I have question on how to sterilise feeding bottles.till now after feeding I used to clean bottles with water and used to keep in hot water for 5min.after using the bottles continuously for 2days I used to clean with baby liquid used to keep bottles in bowl with water and used to boil till water starts boiling.After 6months what is the process of steriliseing bottles.can u please explain??