Cleaning your breast pump parts is not the most exciting part of pumping. But it is one of the most important. Expressed breast milk is a food for your baby and the equipment it passes through needs to be cleaned thoroughly and consistently to remain safe.
The good news is that cleaning pump parts is straightforward once you understand which parts need what treatment and in what order. Most mothers who find it burdensome are doing more than is necessary or are not using the most efficient method for their routine.
This guide covers everything - what to clean, how to clean it, how to sterilize and the things you should never do regardless of what you may have read elsewhere.
The two things you are protecting against
When you clean pump parts you are protecting against two distinct things.
Milk residue - breast milk left in or on pump components provides a growth medium for bacteria. Any surface that milk has touched needs to be cleaned after every session without exception.
Cross contamination - in a shared household where multiple people handle pump parts or in a daycare or work setting where parts may come into contact with other surfaces, cleaning removes the risk of introducing bacteria from outside sources.
Sterilization goes one step further than cleaning, it kills bacteria that cleaning alone may not fully eliminate. For a healthy term baby, thorough washing is the minimum requirement and sterilization is an additional precaution rather than a strict necessity after the newborn period. For a premature baby or a baby with a compromised immune system, sterilization after every session is recommended.
Which parts need cleaning and which do not
This is where most people are uncertain and where understanding your specific pump matters.
Milk-contact parts - clean after every session
These are the parts that breast milk passes through or sits in. They must be washed after every single session without exception.
Flange - the silicone funnel that sits against your breast. Milk passes through the tunnel and residue collects on the interior surface.
Collection cup - the container that holds expressed milk. The entire interior surface needs cleaning.
Valve - in the Solyymoms Air 1, this is the small anvil-shaped flap valve that sits at the junction between the flange and collection cup. The flap opens and closes with suction and milk residue can collect around and under it. It needs careful cleaning at the flap itself.
Diaphragm - the silicone membrane in the motor unit that creates suction. Clean it regularly.
Non-milk-contact parts - clean less frequently
Motor unit - never submerge in water or put in the dishwasher. The motor, battery and electronics are sealed within the unit. Wipe the exterior with a damp cloth when needed. If milk somehow reaches the motor unit - which should not happen with correct assembly, wipe immediately with a slightly damp cloth and allow to air dry completely before use.
How to clean - step by step
After every session
Step 1 - Disassemble immediately Do not leave assembled pump parts sitting with milk residue. Disassemble as soon as you have transferred your expressed milk. The longer milk sits in components the harder it is to clean and the greater the bacterial growth risk.
Step 2 - Rinse under cold water first Rinse all milk-contact parts under cold running water before washing with soap. Cold water rinse prevents milk proteins from bonding to the silicone surface, hot water first can cause proteins to set, making them harder to remove.
Step 3 - Wash with warm soapy water Use warm water and a small amount of dish soap or baby bottle wash. Wash each part thoroughly - inside the flange tunnel, all surfaces of the collection cup, around and under the valve flap, both sides of the diaphragm. Use a small brush to reach inside the flange tunnel and to clean around the valve flap. A dedicated bottle brush or a small pump cleaning brush is useful for this.
Step 4 - Rinse thoroughly Rinse all parts under running water until all soap residue is gone. Soap residue left on parts can affect the taste of milk.
Step 5 - Air dry completely Place all cleaned parts on a clean drying rack or a clean cloth. Air dry completely before reassembling or storing. Do not dry with a cloth or paper towel, this can introduce fibers or bacteria onto the clean surface.
Important note on the valve: The anvil-shaped valve in the Solyymoms Air 1 is very small and transparent. Always wash it over a plugged sink or a bowl - never over an open drain. Handle it carefully and keep it in a dedicated small container when not in use.
Dishwasher cleaning
The milk-contact parts of the Solyymoms Air 1 are dishwasher safe. Place them in the top rack in a small parts basket or mesh laundry bag to prevent them from moving around or falling through the rack. Use a standard dishwasher cycle. Allow to cool and air dry completely before reassembling.
The motor unit is never dishwasher safe.
How to sterilize
Sterilization kills the bacteria that thorough washing may not fully eliminate. For a healthy term baby it is most important in the newborn period, the first three months, and becomes less critical as your baby's immune system matures. For premature babies or babies with health concerns, sterilize after every session as long as your pediatrician recommends.
Method 1 - Microwave steam sterilizer bags
The most convenient method for both home and travel. Reusable microwave bags designed for baby equipment sterilization are widely available. Add the required amount of water, place clean pump parts inside, seal and microwave for the specified time. Parts emerge sterile and can be stored in the sealed bag until next use.
This method is ideal for travelling - the bags are flat, light and work in any hotel microwave.
Method 2 - Electric steam sterilizer
A countertop steam sterilizer is efficient for daily home use if you sterilize frequently. Place clean parts in the sterilizer, add water and run the cycle. Most units complete sterilization in 8 to 12 minutes. Parts remain sterile inside the sealed sterilizer for up to 24 hours.
Method 3 - Boiling
Bring a pot of water to a full boil. Turn off the stove and then place clean silicone and BPA-free plastic parts in the water for 5 minutes. Remove with clean tongs and place on a clean drying rack to air dry.
Do not boil the motor unit. Do not boil parts for longer than 5 minutes - extended boiling can degrade silicone over time.
Method 4 - Cold water sterilization
Sterilizing tablets or solution dissolved in cold water. Parts are submerged for 30 minutes. This method requires no heat and is useful when a microwave or stove is not available. Follow the manufacturer's instructions for tablet-to-water ratio and submersion time.
How often to replace pump parts
Cleaning keeps parts safe to use but does not reverse the natural wear that occurs with daily use. Silicone becomes less supple over time and worn parts can reduce suction effectiveness and pumping efficiency.
Valve - inspect after every wash. The flap should move freely and return to its closed position cleanly. If the flap is torn, stiff or not closing properly, replace immediately. A worn valve is the most common cause of sudden unexplained suction loss. Replacement valves are available from the Solyymoms website at ₹399 for a set of two.
Diaphragm - replace if you notice cracking, stiffness or any visible degradation. With daily use most diaphragms remain in good condition for two to three months. Replacement diaphragms are available from the Solyymoms website at ₹499 for a set of two.
Flange - silicone flanges typically last three to four months with daily use before showing wear. Signs to look for include a loss of softness, any cracking or tearing at the tunnel edge, or a gradual reduction in suction seal quality that cannot be attributed to assembly.
Every Solyymoms Air 1 box includes a spare valve and a spare diaphragm so you have a backup set from day one. This also means you can rotate parts, use one set while the other dries after washing, which is particularly useful for the first session of the day when parts from the previous evening's session may still be drying.
Cleaning when you are at work
Cleaning pump parts at the office is one of the practical concerns that most guides do not address specifically. Here is what works.
If you have access to a sink: Take your parts to the bathroom or kitchen sink after each session and follow the steps above. A small zip pouch to carry the parts to the sink keeps them contained and clean in transit.
If you do not have easy access to a sink between sessions: Use breast pump wipes, pre-moistened wipes specifically designed for cleaning pump parts for a between-session clean when you cannot reach a sink. These are not a substitute for a full wash but they are a safe and practical option for a session during a busy work day. Do a full wash when you return home.
Drying at the office: A small clean cloth kept specifically for pump parts works for initial drying. Allow parts to air dry completely before the next session wherever possible.
End of day: All parts pumped with during the day should receive a thorough wash when you get home regardless of whether you used wipes between sessions at work.
The cleaning routine that works for most mothers
The simplest sustainable cleaning routine is this:
- Wash all milk-contact parts after every session - takes three to four minutes
- Sterilize once daily - either in the evening as part of bedtime routine or in the morning before the first session
- Inspect valve and diaphragm weekly for wear
- Replace parts as needed - do not wait until suction drops significantly
This routine is thorough, manageable and becomes automatic within the first two weeks. The mothers who find cleaning burdensome are usually those who have not yet found a place for it in their existing routine. Once it slots into the post-session flow, transfer milk, disassemble, wash, dry it takes no more time or thought than washing a cup.
What to never do
Never put the motor unit in water - not in the sink, not in the dishwasher, not in a sterilizer. The motor, battery and electronics are sealed within and water will damage them irreparably.
Never microwave pump parts to sterilize them - microwave steam sterilizer bags are safe but placing parts directly in a microwave without water and a sterilizer bag can warp or damage silicone.
Never dry parts with a cloth or paper towel if you can avoid it - use a clean drying rack and air dry.
Never use bleach or chemical disinfectants on milk-contact parts.
Never share pump parts between users without complete sterilization - and even then, it is not recommended for health and safety reasons.
Questions about cleaning your specific pump components? Message us on WhatsApp at +91 7738058413 and we will walk you through it.
