How to Clean a Baby Bottle Steriliser: The Ultimate Aussie Mum’s Guide

Why Clean the Bottle Washer/Steriliser?

In the early days, a baby’s immune system is still finding its feet. As Aussie mums, we’re often juggling everything from Medicare appointments to playdates in the park, but keeping feeding equipment—including bottle sterilisers—pristine is a non-negotiable. Understanding how to clean a bottle steriliser is the foundation of a healthy home. Here is why regular maintenance is so important:

• Stopping mold and bacteria in its tracks: The combination of residual milk proteins and Aussie humidity can turn a steriliser into a breeding ground for bacteria and mold. Regular cleaning ensures these microorganisms don’t stand a chance.
• Maintaining top-tier performance: In many parts of Australia, especially if you’re in a hard water area like Adelaide or Perth, limescale can build up rapidly. These mineral deposits can hinder the heating element, making it less effective at reaching the temperatures needed to kill germs. Regular descaling ensures your unit continues to keep your baby’s bottles as clean as possible.
• Banishing sour smells: Old water and milk droplets can quickly lead to unpleasant odours that cling to your teats and bottles. Frequent cleaning keeps everything smelling fresh for bub’s next feed.
• Protecting your investment: A high-quality steriliser is an investment in your sanity. By keeping it clean, you prevent mechanical wear and tear, helping the device last through the toddler years and beyond.
• Complete peace of mind: A baby monitor lets you keep a watchful eye during naptime, and a clean steriliser gives you that same confidence during feeding. Knowing every component is germ-free means one less thing to worry about.

By staying on top of this routine, you’re creating the safest possible environment for your little one. Along with bottle hygiene, keeping bub’s nose clear is another daily essential. A gentle baby nasal aspirator helps clear blockages quickly, which is especially helpful before a feed or a long sleep.

How to Wash and Clean a Bottle Washer and Steriliser Regularly?

Consistency is key to preventing grime from taking hold. Let’s look at the routine using the Momcozy bottle washer as our guide. Following these steps will keep your unit running efficiently and your baby’s gear safe. Here is how to clean a bottle steriliser the right way:

Step 1: Disassemble the unit. Start by removing all the internal components like the lid and trays so you can reach every nook and cranny.

• First, lift the upper shelf and the upper jet arm assembly straight up to remove them from the main body.

• Gently press the clasp on the lower shelf (as indicated by the arrow) to release the holders.

• Once the holders are cleared, use both hands to lift the lower shelf out.

• With the shelf removed, take out the lower spray arm. Give the residue holder a slight twist to the right to unlock and remove it for cleaning.

Step 2: External and internal wiping. Use a soft, damp cloth to wipe the exterior, the transparent lid, the water tank, and the tank cover. Avoid abrasive sponges that might scratch the plastic.

Step 3: Sanitise internal components. Ensure the base and walls of the internal chamber are free from any standing water or visible spots.

Step 4: Wash and rinse. Clean all removed parts in warm, soapy water. Use a baby-safe detergent, wash gently, and rinse thoroughly to ensure no soapy residue is left behind.

Step 5: Reassemble carefully. Put everything back in the reverse order. Ensure the spray arms and shelves click securely into place so the unit functions perfectly during the next cycle.

How to Deep Clean a Bottle Washer and Steriliser: Should I Use a Solution to Descale?

If you’ve noticed white chalky spots on the heating plate, it’s time to descale. Plain water won’t cut through mineral buildup, so a descaling solution is essential. This process keeps the unit efficient and ensures no mineral flakes end up in your nappy bag or on bub’s teats. Here are four ways to get the job done:

Method 1. White Vinegar (The Aussie Budget Favourite)

The most accessible and cost-effective method is using plain white vinegar from the pantry.

How to do it:

1. Mix equal parts white vinegar and water (1:1 ratio).
2. Pour this into the water tank.
3. Run a full sterilisation cycle (empty, without bottles).
4. Let the unit sit for 30 minutes after the cycle finishes to allow the acid to break down the scale.
5. Discard the solution and rinse with fresh water.
6. Run one final cycle with just plain water to eliminate the vinegar scent.

Method 2. Baking Soda Method

Baking soda is a great mild abrasive and sanitiser for stubborn spots.

1. Dissolve 2 tablespoons of baking soda into 1 cup of warm water.
2. Apply to the tank or affected areas.
3. Let it sit for up to an hour.
4. Scrub gently with a soft cloth or sponge if needed.
5. Rinse thoroughly with fresh water.

Method 3. Citric Acid (Natural and Effective)

Citric acid, often found in the baking aisle, is a powerful natural descaler.

1. Mix 1 tablespoon of citric acid powder with 1 cup of warm water.
2. Pour into the unit and run a full cycle.
3. Allow it to sit for 20 minutes post-cycle.
4. Rinse and run a blank cycle with fresh water.

Method 4. Commercial Descaling Products

There are many "off-the-shelf" cleaners designed specifically for baby appliances.

1. Always follow the manufacturer's dilution instructions.
2. Usually, you fill the tank, run the cycle, and rinse.
3. Crucial: Rinse multiple times. Commercial cleaners can be harsh, so ensure every trace is gone before using the unit for bottles.

Aussie Mum Tip: Regardless of the method, the final rinse is the most important step. You want to ensure no cleaning agent—natural or otherwise—comes into contact with bub’s milk. A final "blank" cycle with tap water is your best friend here.

How Often Should I Clean My Bottle Steriliser?

For daily users, a deep clean once a month is the standard. However, if you live in an area with hard water, you might notice scale building up every week or two. Don't wait for the monthly mark if you see white spots—tackle it early! Always refer to your specific manufacturer’s manual and ensure you're rinsing thoroughly every single time. Following Red Nose Australia’s safe cleaning guidelines alongside your unit's manual will keep bub as safe as possible.

FAQs About How to Clean Sterilisers

Conclusion

Keeping bub healthy involves many moving parts, from sun safety to hygiene. Taking the time to properly clean feeding bottles and knowing how to maintain your steriliser ensures a safer feeding journey. A clean environment means fewer worries about tummy bugs and more time for cuddles. While you're focusing on bub's comfort, don't forget your own—using a supportive nursing bra or pregnancy pillow can make these long days much easier. Remember, these small habits in hygiene pay off in big ways for your baby's health.

As your little one grows and starts solids, maintaining a clean environment around their high chair will be the next step in your parenting adventure.