How Often Should I Sterilize Baby Bottles?
Medically reviewed by Dr. Rachel Kim, MD, RDN · Pediatric Nutrition Specialist
Content reviewed against published CDC, AAP guidelines
Last reviewed:
Feeding challenges are one of the most common concerns new parents face. When it comes to how often should i sterilize baby bottles, here is what the guidelines recommend.
The short answer
The CDC recommends sterilizing new bottles before first use and sanitizing at least once daily for babies under 3 months, premature babies, or immunocompromised babies. For healthy babies over 3 months, thorough washing with hot soapy water after each use is sufficient. You do not need to sterilize before every feed if baby is healthy and bottles are washed properly.
Key takeaways
- The CDC recommends sterilizing new bottles before first use and sanitizing at least once daily for babies under 3 months, premature babies, or immunocompromised babies. For healthy babies over 3 months, thorough washing with hot soapy water after each use is sufficient. You do not need to sterilize before every feed if baby is healthy and bottles are washed properly.
- Usually normal when: You wash bottles with hot soapy water after each use
- Call your doctor if: Baby has symptoms of a serious infection and you suspect contaminated bottles
- Varies by age — see the age-by-age breakdown below
“The AAP recommends exclusive breastfeeding for approximately 6 months after birth. Furthermore, the AAP supports continued breastfeeding, along with appropriate complementary foods introduced at about 6 months, for 2 years or beyond.”
Parents everywhere have the same worry. You are doing the right thing by looking into it.
What Parents Should Know
According to CDC, AAP guidelines, the CDC recommends sterilizing new bottles before first use and sanitizing at least once daily for babies under 3 months, premature babies, or immunocompromised babies. For healthy babies over 3 months, thorough washing with hot soapy water after each use is sufficient. You do not need to sterilize before every feed if baby is healthy and bottles are washed properly. At 0-3 months, sterilize all new bottles and parts before first use. For babies under 3 months, sanitize once daily by boiling for 5 minutes, using a steam sterilizer, or using a dishwasher sanitize cycle. Wash thoroughly after each use. It is generally considered normal when you wash bottles with hot soapy water after each use. However, you should contact your pediatrician promptly if baby has symptoms of a serious infection and you suspect contaminated bottles.
Normal vs. Concerning
By Age
What to expect by age
0-3 months
Sterilize all new bottles and parts before first use. For babies under 3 months, sanitize once daily by boiling for 5 minutes, using a steam sterilizer, or using a dishwasher sanitize cycle. Wash thoroughly after each use.
4-6 months
For healthy babies, thorough washing with hot soapy water and air drying is sufficient. You can continue to sanitize daily if you prefer, but it is not medically necessary for healthy full-term babies.
6-9 months
Continue regular washing after each use. Inspect bottle parts for damage, cracks, or discoloration and replace as needed.
9-12 months
Same washing guidelines. As baby puts everything in their mouth and explores the world, the strict sterilization of bottles becomes less critical than general hygiene.
12-24 months
If still using bottles, regular washing is sufficient. Focus on transitioning to cups. Replace bottle nipples if they show signs of wear.
What to Tell Your Pediatrician
- Describe when you first noticed how often should i sterilize baby bottles and how it has changed over time.
- Note your baby's current age and which age-specific patterns you are seeing.
- Mention if baby frequently has digestive issues and you wonder if bottle hygiene is a factor.
- Mention if you are unsure about proper cleaning techniques for your bottle type.
- Let your doctor know if you have noticed any related concerns, such as changes in feeding, sleep, or movement patterns.
- Bring a list of any questions or observations you want to discuss at the appointment.
What Should You Do?
When to take action
- You wash bottles with hot soapy water after each use
- You sterilize new bottles before first use
- You sanitize daily for babies under 3 months
- Baby frequently has digestive issues and you wonder if bottle hygiene is a factor
- You are unsure about proper cleaning techniques for your bottle type
- Your water supply may not be safe and you need guidance
- Baby has symptoms of a serious infection and you suspect contaminated bottles
- You notice mold or buildup in bottles that cannot be removed with normal washing
What You Can Do at Home
- Keep track of when you notice how often should i sterilize baby bottles — noting the time of day, duration, and any triggers can help your pediatrician.
- Remember that you wash bottles with hot soapy water after each use — this is generally within the range of normal.
- At 0-3 months, focus on observation rather than intervention unless your pediatrician advises otherwise.
- Offer feeding in a calm, distraction-free environment. Avoid forcing or pressuring your baby to eat.
- While monitoring at home, seek immediate care if baby has symptoms of a serious infection and you suspect contaminated bottles.
Related Conditions
What Temperature Should I Use to Prepare Formula?
The WHO recommends using water that has been boiled and cooled to no less than 158F (70C) to prepare powdered formula to kill any bacteria like Cronobacter that may be present in the powder. However, many families in the US use room temperature or warm water. The CDC recommends using water from a safe source. Always follow the mixing instructions on your formula can exactly.
How to Prepare Formula Safely
Safe formula preparation involves using clean water, following the manufacturer's mixing instructions exactly, and practicing good hygiene with bottles and equipment. Using too much or too little water can be dangerous for your baby. The CDC recommends using water from a safe source and, for babies under 3 months or those who are immunocompromised, boiling and cooling the water before mixing.
Formula Storage Guidelines
Prepared infant formula can be stored in the refrigerator for up to 24 hours and should be used within two hours once at room temperature or within one hour after a feeding has begun. Opened containers of powdered formula should be used within one month and kept in a cool, dry place. Following these guidelines helps prevent bacterial growth that could make your baby sick.
Related Resources
Milestone Checklists by Age
Track your baby's developmental milestones from birth to 5 years with age-specific checklists.
Feeding & Nutrition Guide
Complete guide to breastfeeding, formula feeding, and solid food introduction.
Month-by-Month Development
Detailed monthly development guides from birth through 24 months.
When to Call the Doctor
General guide on when to call the pediatrician, visit urgent care, or go to the ER.
Frequently asked questions
Is how often should i sterilize baby bottles normal?
When should I call the doctor about how often should i sterilize baby bottles?
When is how often should i sterilize baby bottles normal?
What causes how often should i sterilize baby bottles?
What should I mention to my pediatrician about how often should i sterilize baby bottles?
Is how often should i sterilize baby bottles normal at 0-3 months?
Is how often should i sterilize baby bottles normal at 4-6 months?
Should I go to the ER for how often should i sterilize baby bottles?
Does how often should i sterilize baby bottles go away on its own?
References
Doctor Visit Checklist
Bring this checklist to your next pediatrician visit to discuss How Often Should I Sterilize Baby Bottles?.
Things to mention
- Describe when you first noticed how often should i sterilize baby bottles and how it has changed over time.
- Note your baby's current age and which age-specific patterns you are seeing.
- Mention if baby frequently has digestive issues and you wonder if bottle hygiene is a factor.
- Mention if you are unsure about proper cleaning techniques for your bottle type.
- Let your doctor know if you have noticed any related concerns, such as changes in feeding, sleep, or movement patterns.
- Bring a list of any questions or observations you want to discuss at the appointment.
Observations to share
- Baby frequently has digestive issues and you wonder if bottle hygiene is a factor
- You are unsure about proper cleaning techniques for your bottle type
- Your water supply may not be safe and you need guidance
Urgent signs to report immediately
- Baby has symptoms of a serious infection and you suspect contaminated bottles
- You notice mold or buildup in bottles that cannot be removed with normal washing
My notes
From ismybabyalright.com — free, evidence-based baby health guides
All content follows our editorial policy and is reviewed against published clinical guidelines.
2,705 evidence-based guides6 authoritative medical sources5 medical advisory board members
Related Resources
Bottom line
Most cases of how often should i sterilize baby bottles are normal. Talk to your pediatrician if baby has symptoms of a serious infection and you suspect contaminated bottles.
Trust your instincts. If something feels wrong, reach out to your pediatrician. Worrying about your baby means you care — that is a good thing.
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Related Feeding Concerns
What Temperature Should I Use to Prepare Formula?
The WHO recommends using water that has been boiled and cooled to no less than 158F (70C) to prepare powdered formula to kill any bacteria like Cronobacter that may be present in the powder. However, many families in the US use room temperature or warm water. The CDC recommends using water from a safe source. Always follow the mixing instructions on your formula can exactly.
How to Prepare Formula Safely
Safe formula preparation involves using clean water, following the manufacturer's mixing instructions exactly, and practicing good hygiene with bottles and equipment. Using too much or too little water can be dangerous for your baby. The CDC recommends using water from a safe source and, for babies under 3 months or those who are immunocompromised, boiling and cooling the water before mixing.
Formula Storage Guidelines
Prepared infant formula can be stored in the refrigerator for up to 24 hours and should be used within two hours once at room temperature or within one hour after a feeding has begun. Opened containers of powdered formula should be used within one month and kept in a cool, dry place. Following these guidelines helps prevent bacterial growth that could make your baby sick.
When to Introduce Allergens to Baby
Current guidelines recommend introducing common allergens (peanut, egg, cow's milk products, tree nuts, wheat, soy, fish, shellfish, sesame) starting around 4-6 months when your baby is developmentally ready for solids. The landmark LEAP study showed that early introduction of peanuts (by 4-6 months) reduced peanut allergy risk by 80% in high-risk infants. Do not delay allergens - the old advice to wait until 1-3 years has been reversed because early exposure actually prevents allergies.
I'm Worried My Baby Is Aspirating During Feeds
Aspiration means liquid or food enters the airway instead of the stomach. Occasional coughing during feeds is common and does not usually indicate aspiration. True aspiration is less common and may present as recurrent respiratory infections, a wet or gurgly voice after feeds, or chronic cough. If you are concerned, a swallow study can provide a definitive answer.
When Does My Baby Need Amino Acid Formula?
Amino acid-based formulas (also called elemental formulas) are prescribed for babies with severe cow's milk protein allergy, multiple food protein intolerances, or conditions like eosinophilic esophagitis who cannot tolerate standard or extensively hydrolyzed formulas. They are the most hypoallergenic formula available because the proteins are broken down into individual amino acids, making allergic reactions virtually impossible.