When do you stop using baby-branded washing detergent for your kids' utensils and milk bottles? Is it okay to wash with mama lemon?

Since it is recommended to sterilise bottles until the baby is at least a year old, I would think that also applies for the use of baby dish soap. I'm currently using Tollyjoy Liquid Cleanser to wash my pump parts since she doesn't drink from bottles and foresee myself using it until she is about 3 years old. It's not too expensive and one drop goes a long way, so I don't see the point of risking it with normal dishwashing liquid which might be too harsh. http://www.babycentre.co.uk/x554846/when-can-i-stop-sterilising-my-babys-bottles