Clean pump parts keep your baby safe. Milk left on parts for hours gives bacteria time to grow. These steps apply to all breast pumps stocked in Sri Lanka, whether they are wearable or portable. They follow NHS and CDC guidance on breast pump hygiene. Use them after every session.
Which parts need cleaning
Not all pump parts need the same care. Separate the parts that touch milk from the ones that do not.
Parts that contact milk (clean after every session):
- Flanges
- Valves and membranes
- Collection bottles
- Tubing (if milk enters the tube)
Parts that don’t contact milk:
- Motor unit: wipe with a damp cloth only if it gets dirty. Never submerge it in water.
- Tubing: if no milk enters the tube, you do not need to clean it after every session. If you see condensation or milk inside, rinse it and hang it to air-dry.
Step 1: Rinse with cold water first
Right after you remove the parts from the pump, rinse everything with cold water. Cold water helps stop milk from setting on the parts. Hot water makes residue harder to remove.
Rinse until no visible milk residue remains.
Step 2: Wash with hot soapy water
Fill a clean basin with hot water and washing-up liquid. Use that basin only for pump parts. Do not use the same one for dishes. Wash each part well. Use a bottle brush inside flanges and the neck of collection bottles. Clean the ridges and grooves where milk collects.
Rinse under cold running water to remove all soap residue.
Step 3: Dry thoroughly
Place parts on a clean paper towel or a drying rack set aside for them. Do not use a cloth towel. Cloth towels can carry bacteria.
Air-dry fully before you reassemble or store the parts. Do not wipe them dry. Wiping can put bacteria back on the parts.
When to sterilise
Wash pump parts after every session. You do not need to sterilise after every session. According to NHS guidance on expressing breast milk, properly washed and dried parts are enough for healthy full term babies.
Sterilise at least once a week. Sterilise before first use. Sterilise if you or your baby have been ill, or if parts have been dropped.
Steam steriliser: Place clean dry parts in a microwave steam steriliser or electric steam steriliser. Follow the instructions for time and water amount.
Boiling: Place parts in a pot of boiling water for five minutes. Use tongs to remove them. Do not boil silicone parts repeatedly. That breaks them down faster.
Sterilising solution: Mix sterilising tablets with cold water according to the packet instructions. Submerge all parts for the required time, usually 30 minutes. No rinsing is needed after that. The solution is safe for babies at the correct dilution.
Always check your pump manufacturer’s instructions before sterilising. Some parts are not safe for every sterilising method.
Storing clean parts
Store clean dry parts in a sealed container or clean zip-lock bag. Keep them in a cool, dry place. Do not keep them next to a sink or in a humid bathroom.
Do not store wet parts. Moisture encourages bacterial growth even in clean parts.
When to replace pump parts
Silicone valves and membranes wear out. Replace them every two to three months with regular daily use. Worn valves reduce suction and affect pumping efficiency. Collection bottle valves are cheap to replace and worth keeping spare.
If you notice:
- Reduced suction despite a clean, assembled pump
- Cracks or discolouration in the membrane
- A milky or off smell from parts after cleaning
Replace the affected parts immediately.
Tubing with condensation
Sometimes condensation builds inside the tubing after a session. This is normal. It does not mean milk entered the tube. Run the pump with the tubes attached but no flanges for one to two minutes. This dries out the condensation. If milk does enter the tubing, disassemble the tube and hang it to air-dry completely.
New to electric pumping? Our electric breast pump guide covers setup and flange sizing.
ZUZU.LK stocks breast pumps with replacement parts in Sri Lanka. Parts and starter pumps are available. Every pump comes with a 6-month warranty. Islandwide delivery takes 2 to 3 working days. Cash on delivery is available.
If you have concerns about pump hygiene for a premature or immune-compromised baby, follow your neonatal unit’s specific cleaning guidance.
Frequently asked questions
Can you clean breast pump parts in a dishwasher?
Some parts are dishwasher safe. Check your pump’s manual. Most flanges and collection bottles are top-rack dishwasher safe. Valves and membranes are too small and can warp in the heat. Hand washing is safer for small silicone parts.
Do you need to sterilise a breast pump after every use?
No. Sterilising after every session is not necessary for healthy full term babies. Sterilise once before first use, then once a week. Follow your neonatal unit’s guidance if your baby is premature, newborn, or immune-compromised.
Does the pump motor unit need to be cleaned?
Never submerge the motor unit or rinse it under water. Wipe the exterior with a damp cloth only. Water inside the motor unit causes permanent damage. Only the milk-contact parts, flanges, tubing, valves, and bottles, need washing.
When should breast pump parts be replaced?
Replace valves, membranes, and tubing every two to three months with regular use. If suction feels weaker and the motor is running normally, worn parts are the likely cause. Check for cracks, cloudiness, or discolouration on all silicone parts.