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CD Tip: Preventing and Treating Mold in Your Diapers

Posted by Valerie on 6/11/2013 to Cloth Diaper How-To

Warm weather is here and the time is right for picnics, playdates, and trips to the beach. Warmer temperatures are often accompanied by an increase in humidity, which can bring about an increase in mold. While mold in diapers is not terribly common, the majority of the calls and emails we receive about moldy diapers come in the summer months.

What is mold?

Molds are a type of fungus that can grow indoors and outdoors. Tens of thousands of species of mold exist throughout the world. Warm, humid climates encourage mold growth, which is why we are more prone to see mold in the summer months and in our bathrooms and kitchens. Mold can be black, green, red or brown in color and often gives off a musty odor. In some individuals mold exposure can cause nasal stuffiness, wheezing, and eye and skin irritation. While not all molds are harmful to all individuals, mold has the potential to be toxic and we want to take extra precautions to keep our families safe.

How can I prevent mold?

Benjamin Franklin once said “An ounce of prevention is worth a pound of cure.” This definitely rings true in regards to mold. Since mold thrives in moist environments, the best way to prevent mold is to minimize your diapers’ exposure to humidity.

  • Store your dirty diapers in a cool, dry place. It might seem logical to store dirty diapers in your bathroom or laundry room, however these rooms are often warmer and have higher humidity than the other rooms in your home.
  • Make sure your diapers are well-ventilated. Sometimes this is as easy as leaving your wet bag cracked open or removing the lid from your diaper pail. Some people may find it is necessary to run a dehumidifier (especially if your home is just prone to mold), but running your AC unit can often have a similar effect.
  • Wash your diapers regularly. I always recommend washing your diapers every other day. Not only can this preserve the quality of your diapers, but it can also help with mold and ammonia issues. Washing frequently does not allow mold the chance to grow. Some of our customers wash daily during particularly warm or humid weeks.
  • Maintain your washing machine per the manufacturer guidelines. Mold can grow in your washing machine and imbed itself in cloth fibers during the wash cycle. Be certain to follow manufacturer instructions to keep your washing machine clean and sanitized.

How do I treat my diapers if they have mold?

Mold on your diapers isn’t the end of the world, but you do need to act quickly to prevent the problem from spreading. All of the diapers sharing the storage space will need to be treated regardless of how many diapers are actually affected by mold. There are a few methods you can use to treat your diapers:

  • Bleach. Chlorine bleach can kill mold. I recommend using 1/4 cup of bleach in your top-loader, or just 1/8 cup in a front-loader. Just pour the bleach into the appropriate receptacle in your washer and run a hot wash cycle. This method is generally safe for pockets, covers, and prefolds, but you will want to try a different method if you are using a dyed or printed natural fiber (such as a fitted).
    *The use of chlorine bleach may void your manufacturer’s warranty, so I always recommend reaching out to the manufacturer to confirm that using bleach is safe in this type of situation.
  • White Vinegar. Vinegar is mildly acidic and has the capability to kill a majority of mold species. You can spray vinegar directly on your diaper or add 1/8-1/4 cup to your wash cycle. Vinegar is less hazardous than chlorine bleach, however it is not as effective and will require multiple treatments to ensure the mold has died.
    *The use of vinegar may void your manufacturer’s warranty, so I always recommend reaching out to the manufacturer to confirm that using bleach is safe in this type of situation.
  • Tea Tree Oil. Tea tree oil can be used to treat mold, however it needs to be in a concentration of at least 4% in order to be effective. I recommend mixing a few drops of tea tree oil with a tablespoon of water and a small amount of detergent and spot scrubbing with a toothbrush. Follow up with a regular hot wash. This method works well on a small number of diapers, however it can be quite costly if your whole stash needs treatment.
  • Grapefruit Seed Extract. Like tea tree oil, grapefruit seed extract is a natural mold-killer, however it can also be costly. I recommend mixing 5-10 drops of grapefruit seed extract with half a cup of water and spraying it directly on the affected diaper. Allow the diaper to sit for 30-60 minutes and follow up with a hot wash.
  • Sunlight. UV rays from sunlight are effective at sanitizing your diapers. Sunning diapers works in some areas, however it may not be worthwhile if you live in an extremely humid climate or have an abundance of mold spores in your environment.

Bleach is definitely the most effective and least costly method for treating mold in your diapers, particularly if you have a large number of diapers that are affected. I certainly understand why some families may choose not to use bleach and I encourage you to weigh both the risks and the benefits before choosing a course of action. Mold can often stain fabrics which makes it hard to tell if the mold is actually dead. It is always a good idea to thoroughly inspect your diapers following treatment. Do not put a diaper on your child if you have any reason to believe the mold may still be living. Try retreating your diapers if the problem still exists. Remember to sanitize your diaper pail and/or wet bag to prevent further occurences.

Continuous bouts of mold in your diapers is not to be expected. If you have problems with persistent mold it may be worthwhile to have a specialist inspect your home for mold and moisture damage.

For More Information

I recommend checking out the following resources if you would like to learn more about mold and it's effects:



Angela Huber
Date: 6/11/2013
Thank you for this post! I live in South Carolina so this issue crept up as soon as it started getting warm and humid. Even with washing my diapers every other day, I still had issues. I recommend unstuffing because the inserts being trapped up against the PUL has encouraged growth in my experience. I will try to leave the lid cracked and see if that helps too. I am nervous that this will make her nursery stink but it is better than mold...
Olivia L
Date: 6/12/2013
Yikes! I haven't had this problem so far thankfully. Good tip about not storing in a humid room. Didn't even think of that.
kate o
Date: 6/14/2013
so glad i've never had this issue! a good way i keep my diapers ventilated is by storing them in a wicker laundry basket with a pail liner. i swear it keeps the smell from building up too which you would think it would smell worse since it is wicker
Date: 6/14/2013
Very informative article. Thankfully, I haven't had this problem with my diapers but should it ever happen, this information will come in very handy.
Kim Hendricks
Date: 6/16/2013
So thankful I haven't had this problem! We live in a drier climate, which I'm sure helps, but will keep these tips in mind if I ever have to deal with mold!
Melissa C.
Date: 6/18/2013
Great tips! Fortunately our apartment stays pretty cool, but I try to crack the pail in the summer.
Date: 6/19/2013
Last summer, I had some mold on a few diapers. The grapefruit seed extract did the trick, followed by some sun time and lemon juice to get the stains.
Date: 6/20/2013
Thanks for the tips. I always keep GSE around after a bout with yeast, but it's good to see it can be used to treat mold too, if that ever becomes a problem.
Date: 5/4/2014
Just wanted to say bleach is not an effective mold killer it just covers it up. Most mold advice is never to use bleach except in very specific cases. My mom is going through a mold spore clean up in their house and this is the advice given to her by multiple sources. We also have an issue and have gotten the same advice.
Julianna Hoch
Date: 7/8/2014
Do these tips help get yeast infection bacteria out of CDs too?
Valerie @Diaper Junction
Date: 9/9/2014
Julianna, yes, these tips will also help get rid of yeast.
Date: 8/10/2016
Great article, but I do not suggest using tea tree oil on anything that will touch your baby. It can cause seizures! Yes, you will wash it off, but I'm paranoid.

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