I have been boiling pot of water with bottles and nipples etc pump parts inside the pots for 3 mins. I don’t want to use microwave and as far as dishwasher sanitizing I don’t have full dishwashers enough to use that ? My grandmother thinks it’s too much work what I do and asked why can’t I sterilize and boil water and use that to just use to hand wash with soap and boiled water to rinse?