Sterilising a dummy is one of those small parenting tasks that carries more weight than it seems. A dummy spends a lot of time in your baby’s mouth, so keeping it clean matters. The quickest safe method is boiling: place the dummy in a pot of boiling water for five minutes, then let it cool completely before giving it back to your baby. That single method is fast, effective, and backed by standard public health guidance. There are other options too, and they all have their own trade-offs between speed, convenience, and how thoroughly they kill germs.
Why Does A Dummy Need To Be Sterilised At All?
A young baby’s immune system is still developing. They do not yet have the defences that older children and adults rely on to fight off everyday bacteria and viruses. A dummy falls on the floor, gets handled by sticky fingers, or sits in a bag for hours. Each time, it picks up germs that then go straight into your baby’s mouth.
Sterilising is not about being obsessive. It is about reducing the number of harmful microorganisms to a level that a young immune system can handle. This is especially important in the first six months, before your baby starts moving around and putting everything else in their mouth anyway.
Once your baby is older and more mobile, daily sterilising becomes less critical. Many health visitors and paediatricians suggest that after six months, washing a dummy in hot soapy water is usually enough for everyday use. But for newborns and young infants, proper sterilisation remains the safer standard.
How To Sterilise A Dummy Quickly And Safely Using Boiling Water
Boiling is the fastest method that reliably kills bacteria, viruses, and fungi. It requires no special equipment beyond a pot and a heat source. The process takes about five minutes of active time.
Here is the step-by-step routine:
- Check the dummy first. Look for tears, cracks, or sticky patches on the teat. If the silicone or latex is damaged, throw the dummy away. Damaged dummies can harbour germs and pose a choking hazard.
- Place the dummy in a clean pot. Add enough water to fully cover it.
- Bring the water to a rolling boil. Keep it boiling for five minutes.
- Remove the dummy using clean tongs. Do not use your fingers — they will reintroduce germs.
- Let the dummy cool completely on a clean, dry surface. The inside of the teat holds water, so squeeze it gently to let trapped moisture escape before it cools.
Do not leave the dummy in the water after the five minutes are up. Leaving it longer does not make it more sterile, and it can damage the material. Silicone dummies generally tolerate boiling well, but latex dummies can degrade faster. Check the manufacturer’s instructions on the packaging the first time you boil a new dummy.
One important safety note: never boil a dummy while the water is unattended. Scalding water is a serious burn risk, and the dummy itself can become dangerously hot. Always let it cool fully before offering it to your baby.
Are Sterilising Tablets Or Cold Water Solutions As Good?
Cold water sterilising solutions are a common alternative, especially when you are out of the house or need to sterilise several dummies at once. These products typically use a dilute solution of a disinfectant, often based on sodium hypochlorite or similar compounds. You soak the dummy for the time stated on the packet, usually around 15 to 30 minutes.
These solutions are effective when used exactly as directed. The key phrase there is “exactly as directed.” If you leave the dummy in for less time than the instructions state, you cannot assume it is fully sterile. If you use too little solution or too much water, the same problem applies.
One practical drawback is the taste. Some babies refuse a dummy that has been soaked in a sterilising solution because it leaves a faint chemical residue. Rinsing the dummy in cooled boiled water after soaking removes most of that taste. Some manufacturers say rinsing is unnecessary, but if your baby is fussy, a rinse with sterile water is a reasonable compromise.
Another consideration is the solution itself. It must be made up fresh each time. A solution that has been sitting for 24 hours is no longer reliably active. This method is convenient, but it requires more attention to detail than boiling.
Is A Microwave Steriliser A Safe Option?
Microwave steam sterilising is probably the fastest method available. It takes about two to three minutes and requires a specific microwave-safe sterilising unit or steam bags designed for this purpose.
These products work by generating steam inside a sealed container. The steam reaches temperatures high enough to kill most harmful microorganisms. When used according to the manufacturer’s instructions, microwave sterilising is considered effective and safe.
The main risks are user error. You must ensure the container or bag is designed for microwave use. You must follow the water amount specified — too little water and the dummy may not be fully sterilised; too much and you may damage the unit. You must also let the contents cool before removing them, because steam burns are quick and serious.
Microwave sterilising is not suitable for every dummy. Some dummies have metal components or decorative parts that cannot go in the microwave. Check the packaging before you buy a dummy if you plan to use this method. Also, dummies with a one-piece construction are generally safer for microwave sterilising than those with separate parts where moisture can get trapped.
What About Dishwashers And UV Sterilisers?
Some parents rely on the dishwasher to clean dummies. A dishwasher cycle with a hot wash and a heated dry cycle can effectively clean a dummy. However, the results depend heavily on your machine, the detergent, and the cycle you choose. A quick or eco cycle may not reach temperatures high enough to sterilise effectively.
If you use a dishwasher, place the dummy in the cutlery basket or a mesh bag so it does not fall into the heating element. Use a hot cycle with a heated dry phase. Remove the dummy while it is still hot and let it cool on a clean surface. Never use the dishwasher for a dummy that has been in contact with raw meat juices or heavily soiled items on the same load.
UV sterilising devices have become popular in recent years. These gadgets use ultraviolet light to kill microorganisms on the surface of the dummy. They are fast and convenient, and they are popular for night-time feeding routines.
The evidence for UV sterilising is more mixed. UV light only affects surfaces it directly reaches. Any part of the dummy in shadow — such as the inside of the teat — may not be fully treated. Some research suggests UV devices can reduce bacterial loads, but they do not always meet the same standard as boiling or steam sterilising. If you use a UV steriliser, treat it as a cleaning aid rather than a guaranteed sterilisation method, especially for newborns.
How Often Should You Sterilise A Dummy?
For a newborn or a baby under six months, sterilising the dummy before every use is the safest approach. That sounds like a lot, but in practice you will likely have several dummies in rotation, and you can sterilise them in a batch.
After six months, you can reduce the frequency. Once your baby is crawling and mouthing toys, floors, and furniture, the additional protection from frequent sterilising becomes less meaningful. At this stage, washing the dummy in hot soapy water and rinsing it thoroughly is generally sufficient for everyday use.
There are exceptions. If your baby has been ill, if the dummy has fallen on a dirty surface like a public pavement, or if it has been in contact with someone else’s mouth, sterilise it before the next use. These are high-risk situations where extra caution is justified.
Also, replace dummies regularly. Most manufacturers recommend replacing a dummy every two months, or sooner if it shows signs of wear. Silicone dummies can become sticky or develop tiny tears that are hard to see. A damaged dummy is harder to clean and can harbour germs in the cracks.
Common Mistakes Parents Make
One of the most common mistakes is putting a dummy in your own mouth to “clean” it. Adult mouths contain bacteria that are harmless to adults but can cause problems for a baby. This practice transfers those bacteria directly to your baby, and it does nothing to remove visible dirt or germs.
Another mistake is using sugar water, honey, or other sweet substances on a dummy to soothe a fussy baby. This is not a sterilising method, and it is actively harmful. Sugar promotes tooth decay as soon as teeth appear, and honey can carry bacteria that are dangerous for infants under one year old.
Some parents also assume that a dummy that looks clean is clean. Visible cleanliness is not the same as sterility. Bacteria are invisible to the naked eye. A dummy that looks perfectly fine can still carry enough germs to make a young baby unwell.
Finally, do not store a wet dummy in a sealed container. Moisture encourages bacterial and fungal growth. After sterilising, let the dummy dry completely on a clean surface before putting it in a storage case. If you need to carry it with you, use a ventilated dummy case rather than an airtight one.
When To Stop Sterilising Completely
There is no single universal rule for when to stop sterilising a dummy. The general direction in public health guidance is that sterilising becomes less important as your baby grows and their immune system matures. Most health professionals consider that by the time a baby is actively crawling and putting non-sterile objects in their mouth, the risk from a dummy is no greater than the risk from anything else they encounter.
For most families, stopping daily sterilising around the six-month mark is reasonable. Continue to wash the dummy with hot soapy water after each use, and rinse it thoroughly. If you are ever in doubt — after illness, after a fall on a dirty surface, or if the dummy has been shared — a quick boil is always a safe fallback.
Frequently Asked Questions
Can I sterilise a dummy in the microwave without a special steriliser?
No, you should not microwave a dummy on its own. A microwave steriliser or steam bag is required to generate enough steam safely.
How long do you boil a dummy to sterilise it?
Boil the dummy for five minutes in water that is at a rolling boil. Let it cool completely before giving it to your baby.
Is it safe to put a dummy in the dishwasher?
Yes, if the dummy is dishwasher-safe and you use a hot cycle with a heated dry phase. Place it in a mesh bag or cutlery basket so it does not touch the heating element.
Do I need to rinse a dummy after using sterilising tablets?
Rinsing with cooled boiled water is a safe option, especially if your baby dislikes the taste. It does not reduce the sterilising effect if done after the full soaking time.

