Cleaning Breast Pump Parts: A Simple Guide to Keep Everything Safe and Sanitary

When it comes to feeding your baby, cleanliness is just as important as nutrition. Breast pumps are essential tools for many moms, no matter manual, electric or wearable breastfeeding pumps, but without proper cleaning, they can harbor bacteria, mold, and milk residue that could compromise your baby’s health. Even a small amount of leftover milk can become a breeding ground for germs, especially if the pump is stored warm and damp. That’s why developing a consistent cleaning routine is essential from the very first use.

This guide covers everything you need to know about cleaning breast pump parts—from what needs to be washed after each session to how to sanitize and store your equipment safely. Whether you’re a first-time mom or an experienced pumper, these tips will help keep your gear safe, efficient, and ready whenever your baby needs it.

Why Proper Cleaning Is So Important for Your Baby’s Health

Milk is rich in nutrients, which is great for your baby—but also great for bacteria. Without thorough cleaning, germs can multiply quickly on pump parts, increasing the risk of contamination. Newborns have developing immune systems, making them more vulnerable to illnesses caused by unsafe milk handling.

Proper cleaning not only prevents health risks but also maintains pump performance. Residue buildup can affect suction and shorten the lifespan of your breast pump parts, meaning you’ll need to replace them sooner than necessary.

Which Breast Pump Parts Need to Be Cleaned After Each Use

Every part that comes into direct contact with breast milk should be cleaned after each pumping session. This includes:

• Breast shields/flanges
• Valves and membranes
• Bottles and bottle caps
• Tubing (only if milk or moisture gets inside—most closed-system tubing does not require frequent washing)
• Connectors and adapters

Pro tip: Refer to your pump’s manual for brand-specific cleaning instructions. If you’re using Momcozy’s electric breast pump collection, the manuals include part-specific cleaning guidance for better care.

Step-by-Step: How to Wash Pump Parts by Hand

Handwashing pump parts is one of the most effective ways to ensure a thorough clean, especially if you don’t have a dishwasher.

Step 1: Disassemble All Parts
Separate every removable part to make sure all milk residue is removed.

Step 2: Rinse Under Running Water
Rinse each part in cool water immediately after use to remove milk proteins before they dry.

Step 3: Wash in Warm, Soapy Water
Fill a clean basin (not the kitchen sink) with warm water and mild, baby-safe dish soap. Use a designated brush or sponge for pump parts only.

Step 4: Rinse Again
Rinse thoroughly with clean running water to remove all soap.

Step 5: Air-Dry on a Clean Towel or Drying Rack
Place parts on a fresh towel or rack in an area free from dust and grease. Avoid using cloth towels for drying, as they can transfer bacteria.

Can You Use a Dishwasher? What You Need to Know

Yes, you can wash many breast pump parts in the dishwasher — but it’s not a one-size-fits-all rule. Always check the manufacturer’s manual to confirm which parts are dishwasher-safe, as some materials may warp, crack, or lose suction performance with repeated heat exposure.

Best Practices for Dishwasher Cleaning:

• Use the top rack only – This keeps parts away from the heating element at the bottom, reducing the risk of melting or warping.
• Opt for hot water and a heated dry cycle – The heat helps kill bacteria and speed up drying, minimizing the chance of mold growth.
• Avoid harsh detergents – Choose mild, fragrance-free options to prevent chemical residues that could be harmful to your baby.
• Secure small parts – Place items like valves and membranes in a mesh dishwasher basket or small parts container so they don’t get lost.
• Air-dry after the cycle – Even with a heated dry, it’s best to let parts fully air-dry on a clean towel before reassembly to prevent moisture buildup.

Important to Note:
While dishwashers save time for busy moms, frequent high-heat washing can cause silicone valves, membranes, and other delicate parts to wear out faster. If you notice cracks, discoloration, or loss of elasticity, replace the part immediately to maintain your pump’s suction and hygiene.

How to Sanitize Pump Parts (and When It’s Needed)

Sanitizing goes beyond regular cleaning by killing any lingering bacteria or viruses. It’s especially important when your baby is premature, under three months old, or has a weakened immune system.

Ways to sanitize pump parts:

• Boiling: Submerge parts in boiling water for 5 minutes, then air-dry.
• Steam sterilizers: Electric or microwave steam bags work quickly and are travel-friendly.
• UV sterilizers: Use light to kill bacteria without heat or chemicals.

Sanitize at least once daily if your baby is high-risk, and weekly for older, healthy babies.

Drying and Storing Pump Parts Safely

How you dry and store pump parts matters as much as washing them.

• Always air-dry completely before assembly to prevent mold growth.
• Store in a clean, dry, lidded container or resealable bag.
• Keep parts away from kitchen sinks to avoid contamination from food prep areas.
• Never store damp parts in sealed containers—this encourages bacterial growth.

By keeping your pump parts dry and protected, you extend their lifespan and maintain hygiene.

Cleaning Tips for On-the-Go Pumping Moms

Pumping outside the home can be challenging, but with the right prep, you can keep everything sanitary.

• Bring extra pump parts so you don’t have to clean between sessions.
• Use disposable pump wipes for quick cleanups in a pinch (but wash parts thoroughly later).
• Pack a sealed wet bag for used parts until you can wash them.
• Consider a portable steam sterilizer for hotel stays or travel days.

A small travel cleaning kit ensures you’re never caught without a way to clean your pump safely.

How Often to Replace or Deep-Clean Specific Parts

Even with perfect cleaning habits, pump parts wear out over time.

• Valves and membranes: Replace every 1–3 months, or sooner if suction drops.
• Tubing: Replace if cracked, moldy, or discolored.
• Flanges and bottles: Replace if warped, scratched, or showing signs of residue buildup.

A monthly deep clean—soaking all washable parts in warm water and baking soda—can help remove lingering odors and mineral deposits.

Conclusion

Cleaning breast pump parts may feel like a never-ending task, but it’s one of the most important steps you can take to keep your baby healthy. By washing every part that touches breast milk, drying thoroughly, and storing properly, you reduce the risk of contamination and help your pump last longer.

Whether you prefer handwashing, dishwasher cleaning, or steam sanitizing, the key is to be consistent and thorough. With a good routine, you can feel confident that every feeding is safe, fresh, and free from harmful germs—giving your baby the best start possible.