How to Clean Baby Bottles: Washing, Sterilizing & Nipple Care
By Jasman, Co-founder of PureZest | Updated October 2026 | 8-minute read
If you're wondering how to clean baby bottles properly, the short answer is: take everything apart, rinse right after feeding, wash each piece in hot soapy water with a bottle brush, rinse well, and let it air-dry completely. For young babies, add a sterilizing step (boiling for two minutes) after washing. Below, I'll walk you through every step, plus nipples, formula film, travel days and the mistakes I see most often.
Key Takeaways
- Wash every bottle after every feeding: disassemble fully (bottle, nipple, ring, cap, valves) and scrub in hot soapy water with a dedicated bottle brush.
- Rinse right away so milk and formula don't dry into a sticky film that's harder to remove.
- Washing and sterilizing are different steps. Soap and scrubbing remove milk residue; boiling for two minutes is how Health Canada says to sterilize feeding equipment.
- Air-dry completely on a clean rack before reassembling. Never towel-dry with a used dish towel.
- Use a dish soap that rinses clean with no added synthetic fragrances, so nothing lingers on the nipple your baby puts in their mouth.
Why Cleaning Baby Bottles Properly Matters
Milk and formula are rich in fat, protein and sugar, so any residue left in a bottle or nipple turns sour quickly. That residue can cause bad odours, cloudy film and a slick feel that your baby may notice before you do.
Bottles also have lots of hidden spots: the threads of the ring, the nipple tip, anti-colic vents and valves. A quick rinse doesn't reach those. A proper wash with a brush does.
What You'll Need
- A clean wash basin or a dedicated, clean sink (don't wash bottles directly in a sink full of other dishes)
- A bottle brush and a small nipple brush, used only for baby items
- A gentle dish soap that rinses clean, like PureZest Enzyme Dish Soap
- Hot running water
- A clean drying rack or a clean tea towel to air-dry on
- A pot with a lid and clean tongs (for sterilizing)
How to Clean Baby Bottles by Hand (Step by Step)
- Wash your hands with soap and water first.
- Take everything apart: bottle, nipple, ring, cap and any vent inserts or valves.
- Rinse each piece under running water as soon as possible after the feed.
- Fill your basin with hot water and a small squirt of dish soap. A little goes a long way.
- Scrub the inside of the bottle with the bottle brush, paying attention to the bottom edge and the threads at the neck.
- Clean the nipple and vents with the nipple brush, then squeeze soapy water through the nipple hole to flush it out.
- Rinse thoroughly under running water until no suds remain.
- Air-dry on a clean rack. Store parts loosely covered until fully dry, then reassemble.
How to Sterilize Baby Bottles Without a Sterilizer
You don't need a special machine: a pot of boiling water works. Health Canada recommends sterilizing bottles, nipples, lids and other equipment by boiling them in an open pan of water for two minutes.
- Wash and rinse everything first. Sterilizing doesn't replace washing.
- Place the pieces in a pot and cover them completely with water, making sure there are no air bubbles trapped inside.
- Bring to a rolling boil and boil for two minutes.
- Remove with clean tongs and let everything air-dry and cool. Cover with a clean tea towel if you won't use them right away.
Prefer an electric or microwave steam sterilizer? That's fine too; just follow the manufacturer's instructions.
How Often Should You Sterilize Baby Bottles?
Wash after every feeding, every time. How often to sterilize depends on your baby's age and your public health unit's advice. Alberta Health Services advises sanitizing feeding equipment before use for babies under 4 months old, and Toronto Public Health recommends sterilizing expressed breast milk equipment for babies of any age.
Because guidance varies, it's worth asking your public health nurse or family doctor what they recommend for your baby, especially if your baby was premature or unwell.
How to Clean Baby Bottle Nipples
Nipples need the most attention because milk collects in the tip. Here's what works:
- Turn them inside out (if the design allows) and scrub with a nipple brush.
- Flush the hole by squeezing hot soapy water, then clean water, through it.
- Check the hole isn't clogged before every use.
- Inspect regularly. Toronto Public Health advises throwing out nipples once they become soft and sticky. Replace any that are cracked, torn or swollen too.
How to Clean Baby Bottles After Formula (and Remove Cloudy Film)
Formula leaves a fattier, stickier residue than breast milk, so rinsing right after the feed makes a big difference. If residue has dried, soak the pieces in warm soapy water for 5 to 10 minutes before brushing.
Seeing a cloudy white haze that won't scrub off? That's often mineral buildup from hard water, common in Calgary, Winnipeg and much of southern Ontario. Homes in Metro Vancouver, with softer water, tend to see less of it. A soak in a mix of equal parts white vinegar and water for a few minutes, followed by a thorough wash and rinse, usually clears it. Always check your bottle manufacturer's care instructions first.
Can You Clean Baby Bottles in the Dishwasher?
Many bottles are top-rack dishwasher safe. Check the label. Put small parts in a mesh basket so they don't fall to the heating element, and use regular dishwasher detergent.
Alberta Health Services notes that a dishwasher only counts as sanitizing if it has an NSF-certified sanitize cycle. Important: never put hand dish soap (including ours) in a dishwasher. It foams up and can flood your kitchen floor. Dish soap is for hand washing only.
How to Clean Baby Bottles When Travelling or Camping
- Pack a travel bottle brush, a small bottle of dish soap and a collapsible basin.
- Rinse bottles right after each feed, even if you can't wash them yet.
- If you're unsure about the water (at a cottage on a well, for example), use boiled and cooled water for washing and rinsing.
What NOT to Do When Cleaning Baby Bottles
- Don't use bleach or harsh cleaners on feeding equipment. They're unnecessary for routine washing and can leave residue. And never mix bleach with acids (like vinegar) or ammonia, since this releases dangerous gases.
- Don't use heavily scented soaps. Fragrance can linger on silicone nipples.
- Don't share the brush with greasy pots and pans. Keep a dedicated baby brush and replace it when bristles splay.
- Don't towel-dry with a used dish towel. Air-drying is cleaner.
- Don't store bottles wet and assembled. Trapped moisture leads to musty odours.
- Don't use abrasive scrubbers on plastic bottles; scratches hold residue.
A Simple Bottle-Cleaning Routine That Sticks
- After every feed: disassemble and rinse immediately.
- Once or twice a day: do a full hot-water wash of all used bottles in one batch.
- As advised for your baby's age: sterilize by boiling for two minutes.
- Weekly: wash the drying rack and bottle brushes, and inspect nipples.
- Every few months: replace brushes, worn nipples and scratched bottles.
For more on choosing products around little ones, see our parent's guide to safe cleaning products for babies and toddlers.
Why We Use PureZest Enzyme Dish Soap for Baby Bottles
When we developed our Enzyme Dish Soap, rinsing clean was a must. That matters more for baby bottles than for almost anything else in your kitchen.
- Rinses clean with no residue, so bottles, nipples and glassware come out clear.
- Citrus enzymes help break down food residue, so sticky formula film lifts away more easily.
- Free from synthetic fragrances, phthalates and SLS, with a light note of lemon oil.
- Gentle on hands with a coconut-derived moisturizing ingredient, helpful when you're washing bottles eight times a day.
- Septic-safe, and the enzyme-rich rinse water helps keep your drain and P-trap fresh.
- The soak hack: for dried-on formula, soak 5 to 10 minutes, then brush.
Pair it with our coconut fibre utensil scrubber for the rest of your dishes, and stock up with the 1.9 L refill to cut down on plastic bottles. Curious why enzymes work so well on food residue? Read how enzyme dish soap changes the way you wash.
Shop PureZest Enzyme Dish Soap →
Setting up a kitchen for a new baby? Browse all our natural kitchen cleaning products, from dish soap to plastic-free scrubbers and refills.
Frequently Asked Questions
How do you clean baby bottles for the first time?
Before first use, wash new bottles, nipples and parts in hot soapy water, rinse well, then sterilize by boiling for two minutes. Let them air-dry fully before assembling.
Can I use regular dish soap to clean baby bottles?
Yes, a gentle dish soap works well for baby bottles. Look for one that rinses clean and has no added synthetic fragrances, so no scent or residue lingers on silicone nipples. Rinse thoroughly under running water either way.
Do I need to sterilize baby bottles after every use?
You need to wash bottles after every use. Sterilizing guidance varies by baby's age and health: some Canadian health authorities advise it for babies under 4 months, others for all ages. Ask your public health nurse or doctor what's right for your baby.
How long do you boil baby bottles to sterilize them?
Health Canada recommends boiling bottles, nipples and other feeding equipment in an open pan of water for two minutes. Make sure everything is fully submerged with no trapped air bubbles. Remove with clean tongs and air-dry.
How do you get the smell out of baby bottles?
A sour smell usually means milk residue is hiding in the threads, vents or nipple tip. Soak the parts in warm soapy water for 5 to 10 minutes, scrub every crevice with a brush, rinse well and let everything dry completely before reassembling.
When should you replace baby bottle nipples?
Replace nipples when they become soft, sticky, cracked, torn or swollen. Toronto Public Health advises throwing them out once they turn soft and sticky. Check them before every feed by gently pulling on the tip.
The Bottom Line
Cleaning baby bottles comes down to a simple rhythm: rinse right away, take everything apart, wash in hot soapy water with a dedicated brush, rinse well and air-dry. Add a two-minute boil when your baby's age or your health provider calls for it. A gentle, residue-free soap makes the daily routine easier on both bottles and hands. Try PureZest Enzyme Dish Soap for your next batch.
About the author: Jasman is the co-founder of PureZest, a BC-based natural cleaning brand, and previously ran a cleaning services business.
