Willow Flange Set Cleaning and Storage: Prevent Mold and Odors

Quick Answer

To prevent mold and odors, clean your Willow flange set immediately after each use with warm soapy water and a soft brush, rinse thoroughly, and air-dry completely before storage. Replace flanges every 90 days or when you notice signs of wear, and store them in a clean, dry container.

Your Willow flange set is the key to comfortable, efficient pumping. But if it isn't cleaned and stored properly, it can become a breeding ground for mold and unpleasant odors. This guide walks you through the best practices for keeping your flanges hygienic and extending their lifespan.

We'll cover step-by-step cleaning instructions, drying techniques, and storage solutions, plus the common mistakes that lead to mold growth. You'll also learn when it's time to replace your flanges, so you can pump with confidence.

Why Mold and Odors Happen

Mold and odors typically develop when milk residue is left to dry inside the flanges or when they're stored while still damp. Breast milk is rich in nutrients, making it an ideal environment for bacteria and mold if not cleaned promptly. Even if you rinse your flanges quickly, small amounts of milk can linger in crevices.

Another common culprit is improper drying. Flanges that are placed in a cupboard or bag while wet create a moist, dark environment where mold thrives. Odors also develop when the silicone and plastic components absorb milk fats over time, especially if they're not cleaned regularly.

• Always clean your flanges within an hour after pumping to prevent milk residue from hardening.
• Ensure flanges are completely dry before storing them in any closed container.

Step-by-Step Cleaning Process

Start by disassembling your Willow flange set, separating the flange, duckbill valve, and any other removable parts. Rinse each piece under cool or lukewarm water to remove milk residue. Avoid hot water initially, as heat can set milk proteins onto the silicone.

Wash each part gently with a soft brush or cloth and a mild, fragrance-free dish soap. Pay special attention to the narrow tube and duckbill valve where milk can hide. Use a cleaning brush specifically designed for pump parts to reach all crevices.

Rinse thoroughly under running water to remove all soap residue, then shake off excess water. Lay the parts on a clean, dry towel or a drying rack in a well-ventilated area. If you're in a hurry, you can also use a sterilizer or sanitizing wipes, but always follow the manufacturer's instructions.

Once completely dry, reassemble the flange set and store it in a clean, dry container. Avoid storing flanges in a plastic bag, as this traps moisture. Instead, use a ventilated container or a dedicated pump parts bag.

• Check for any visible milk residue by holding parts up to the light.
• Never use abrasive sponges or cleaners that could scratch the silicone.

Drying Tips to Prevent Mold

Proper drying is just as important as cleaning. After rinsing, shake off excess water and place each piece on a clean, absorbent towel or a drying rack. Ensure all parts are positioned to allow air to circulate, preventing water from pooling in crevices.

If you're in a hurry, you can use a clean, lint-free cloth to gently pat parts dry, but air drying is the most effective. Avoid assembling flanges until they're completely dry. If you're using a sterilizer, make sure the parts are fully dry before storing.

Consider using a dedicated drying rack that allows each component to stand upright, so water drains out easily. Some parents use a small fan to speed up the process. Remember that even a small amount of moisture can lead to mold, so it's worth the extra time.

• Air dry for at least 30 minutes to 1 hour before storing.
• If you notice a musty smell, inspect the flanges carefully for mildew spots.

Storage Solutions That Work

Once your flanges are clean and dry, store them in a clean, dry, and ventilated container. A plastic storage bin with a loose or vented lid works well, as does a dedicated pump parts bag that allows air circulation. Avoid airtight containers without ventilation, as they can trap any residual moisture and encourage mold.

If you pump multiple times a day, you might store flanges in the refrigerator between sessions to keep milk residue from going bad. Place them in a sealed plastic bag or container to keep them clean. However, this is only a temporary solution; you should still clean them thoroughly at least once a day.

Always label your storage container with the date you last deep-cleaned the parts, so you remember when it's time for a refresh. Also, keep flanges away from direct sunlight and heat, which can degrade silicone over time.

• Store each flange set separately to avoid parts getting mixed up.
• Never store flanges while they are still wet or damp.

When to Replace Your Willow Flange Set

Even with meticulous care, Willow flanges will eventually wear out. The Willow website recommends replacing your parts every 90 days or when you notice discomfort or signs of wear. Signs of wear include discoloration, stickiness, cracks, or a lingering odor that persists even after thorough cleaning.

Using worn flanges can reduce your pump's efficiency and may even affect your milk supply. If you experience any discomfort during pumping, check your flanges for damage and consider replacing them. It's always a good idea to have a backup set on hand, so you're never caught without clean parts.

• Mark your calendar to replace your flanges every 3 months.
• Inspect your flanges weekly for any signs of wear.

Step-by-Step Willow Flange Care Routine

1. Clean Immediately After Use: Disassemble your Willow flange set right after pumping and rinse each part under cool water. Use a soft brush and mild soap to remove milk residue. Avoid letting milk dry on the flanges; this prevents mold and makes cleaning easier.
2. Rinse and Dry Thoroughly: Rinse all parts under running water to remove soap. Shake off excess water and air-dry on a clean towel or drying rack until completely dry. Aim for at least 30 minutes of drying time; never store wet parts.
3. Store in a Ventilated Container: Place dried flanges and accessories in a clean, dry container with ventilation. Keep them away from sunlight and heat. Proper storage prevents moisture buildup and prolongs the life of your flange set.
4. Schedule Regular Replacements: Mark your calendar to replace your Willow flange set every 90 days or sooner if you notice signs of wear or discomfort. Regular replacement ensures optimal performance and hygiene.

Willow Flange Set Maintenance

• Willow Go® Flange Set (2-pack): Willow Go's flanges come in 3 sizes so you can find your best fit. In addition, 24mm flanges are compatible with sizing inserts for mamas who measure smaller than 21mm. Replacing Your Parts For optimal output, replace every 90 days (or when you notice discomfort or signs of wear). Choosing the right size flange is essential for comfort and output, and regular replacement every 90 days is key to preventing mold and maintaining hygiene.
• Willow Go® Wearable Breast Pump: Our best-selling pump, powered by innovative ComfortFlowTM technology for more milk output. Customizable hospital-grade suction, app-controlled, and ranked #1 Wearable Breast Pump by Babylist, this top seller is perfect for multitasking moms. Kit comes with 21, 24mm flanges & 5 oz SplashGuardTM containers. Your Willow Go pump relies on clean flanges for optimal performance; proper care ensures consistent suction and milk output.
• Willow 360® Container Set (2-pack): Willow is the only pump that gives you the flexibility to pump directly into spill-proof storage bags or our reusable Containers. For optimal output, replace every 90 days (or when you notice discomfort or signs of wear). If you use reusable containers, keeping them clean and dry is equally important to prevent odor transfer and mold in your flange set.
• Willow 360® Spill-proof Milk Bags (48-pack): The only disposable, spill-proof collection and storage Milk Bag. Pump directly into self-sealing storage bags. Offer truly spill-proof mobility - pump in any position (even lying down or doing yoga) Pump on the go and toss into your purse or cooler bag - totally hygienic, no need to seal or transfer. Using spill-proof bags can simplify cleanup and reduce the need for extra containers, but you still need to care for your flanges properly.

Proper cleaning and storage of your Willow flange set are essential for hygiene, comfort, and pump performance. By following these steps and replacing your parts every 90 days, you'll keep mold and odors at bay and enjoy reliable pumping sessions. For more guidance, check your pump's manual or Willow's official resources.