Keeping your baby's bottles clean is one of those things that sounds simple — but it's important to do it right. Here's what you need to know, based on Canadian health guidelines.
Clean first, sterilize second
Cleaning and sterilizing aren't the same thing, and both matter. Cleaning removes milk residue; sterilizing kills bacteria that washing alone can leave behind. Young babies' immune systems are still developing, making them more vulnerable to infections, which is why health authorities recommend sterilizing feeding equipment — especially in those early months.
How to clean bottles
Rinse the bottle and teat with cold water straight after feeding — cold water removes milk residue more easily than warm. Then wash thoroughly with hot soapy water using a bottle brush, and rinse again with clean water.
How to sterilize
Alberta Health recommends sterilizing bottles and nipples for babies under 4 months old by boiling them in an open pot of clean water for 2 minutes. The City of Toronto notes there is no research that says when to safely stop sterilizing, and recommends sterilizing equipment for babies of any age.
There are a few ways to sterilize, and none of them are complicated:
Boiling: Submerge bottles and teats in a large pan of water and boil for 2 minutes, making sure everything stays under the surface. Set a timer so you don't forget to turn the heat off.
Microwave sterilizer: Add water, place inside, and it's done in minutes. Practical for at home or travelling.
Electric steam sterilizer: Takes a little longer but handles multiple bottles at once — useful if you're feeding frequently. Some models also dry the bottles, which saves an extra step.
Whichever method you use, leave bottles and teats in the sterilizer until you need them, and always wash and dry your hands before handling sterilized equipment.
A note on premature or unwell babies
If your baby was born prematurely or is unwell, extra care is especially important. Their immune systems are more vulnerable, so sterilizing after every use is particularly vital — check with your healthcare provider for personalized advice.