How do I keep mold off my Oral B toothbrush?

Quick Answers

Here are some quick tips for keeping mold off your Oral B toothbrush:

  • Rinse your toothbrush thoroughly after each use and allow it to air dry completely before putting it away.
  • Store your toothbrush upright in an open-air holder, not a closed container.
  • Replace your toothbrush or toothbrush head every 3-4 months.
  • Clean your toothbrush holder regularly.
  • Consider using an antimicrobial toothbrush.
  • Don’t share your toothbrush with others.

What Causes Mold to Grow on Toothbrushes?

Mold grows easily in warm, moist environments- exactly the kind of conditions found inside a closed toothbrush holder or travel case. Our mouths also provide an ideal breeding ground for mold and bacteria.

When you brush your teeth, your toothbrush bristles pick up traces of food, saliva, and microorganisms. If your toothbrush stays damp after brushing, the bristles provide the perfect place for mold and bacteria to multiply.

Common Causes of Toothbrush Mold

  • Not rinsing toothbrush thoroughly after use
  • Not allowing toothbrush to air dry before storage
  • Storing toothbrush in a closed holder or travel case
  • Sharing toothbrush with others
  • Using toothbrush beyond its typical 3-4 month lifespan

Is Toothbrush Mold Dangerous?

Mold spores are present everywhere in our environment. Small amounts are not necessarily harmful to healthy individuals. However, repeated exposure to large amounts of mold raises potential health risks.

When mold grows on a toothbrush, it can lead to reinfection of the mouth and contamination of the brush. Frequent inhalation or ingestion of mold spores may trigger allergic reactions or respiratory irritation in sensitive individuals.

Some common health concerns associated with mold exposure include:

  • Congestion, coughing, sneezing
  • Skin irritations
  • Asthma attacks
  • Headaches, fatigue
  • Respiratory infections
  • Suppressed immune system

While most symptoms are relatively mild, people with weakened immune systems may develop more severe complications from mold overgrowth. Frequent exposure is not recommended for children, seniors, or those with chronic illnesses.

Other Oral Health Risks

In addition to mold growth, failing to properly clean your toothbrush can allow harmful bacteria to accumulate. Old toothbrushes often harbor higher levels of bacteria, including strains that contribute to gum disease and tooth decay. Sharing a toothbrush also transfers bacteria between individuals.

How to Prevent Mold on an Oral B Toothbrush

Practicing good oral hygiene and proper toothbrush care is the best way to avoid mold. Here are some tips to keep your Oral B toothbrush fresh and mold-free:

Rinse Thoroughly After Each Use

Always rinse your Oral B toothbrush bristles thoroughly with clean water after brushing. This removes excess toothpaste and traces of saliva or debris that can promote bacterial growth. Take care to rinse both the bristles and the toothbrush handle.

Allow Your Toothbrush to Air Dry

After rinsing, let your toothbrush air dry completely before putting it away. Lay it bristle-side up on a clean washcloth or paper towel. An open-air drying rack also works well. Avoid using any type of toothbrush cover before it is fully dry.

Store Your Toothbrush Properly

The ideal storage position for your Oral B toothbrush is upright with the bristles at the top. This allows air circulation and drainage. Place your toothbrush in an open holder, not a sealed travel case or container. Also avoid jam-packed toothbrush cups, which prevent drying.

Clean Your Toothbrush Holder

Disinfect your toothbrush holder at least weekly using antibacterial soap and hot water. Rinse thoroughly and allow to fully air dry. This prevents a buildup of bacteria that could transfer back to your brush.

Replace Your Toothbrush Regularly

With frequent use, Oral B recommends replacing your manual toothbrush or electric toothbrush head every 3-4 months. The bristles become frayed with use, making it easier for bacteria to cling to the brush. Mark your calendar to remind you when it’s time for a new brush.

Consider an Antimicrobial Toothbrush

Antimicrobial toothbrushes contain additives that help inhibit microbial growth. The Oral B Pro-Health toothbrush line includes bristles treated with an antimicrobial agent. This added protection helps reduce bacterial buildup.

Avoid Sharing Your Toothbrush

Sharing a toothbrush allows transfer of bacteria and viruses between individuals. Always use a separate personal toothbrush that is not used by anyone else.

Disinfect With Peroxide or Vinegar

If mold appears on your toothbrush, first replace the brush. Then disinfect the toothbrush holder by soaking in peroxide or vinegar, which help kill mold and bacteria.

Get a New Toothbrush After Illness

Replace your Oral B toothbrush after any illness, especially illnesses affecting the mouth or respiratory system. Flu, colds, strep throat, and other sicknesses allow bacteria to flourish.

What to Do If You See Mold on Your Toothbrush

If you notice mold growth or discoloration on your Oral B toothbrush bristles or handle, you should replace your toothbrush right away. Moldy toothbrushes cannot be adequately cleaned at home.

Step 1: Throw Out the Toothbrush

Discard the contaminated toothbrush in the garbage. Do not attempt to salvage a toothbrush with visible mold growth. Trying to clean the brush may spread the mold spores further.

Step 2: Clean the Toothbrush Holder

Wash the toothbrush holder thoroughly with hot, soapy water and let air dry. Soak in a 50/50 vinegar and water solution or a 3% hydrogen peroxide solution to help kill spores.

Step 3: Get a New Toothbrush

Use a new Oral B toothbrush to brush your teeth. Make sure to rinse and air dry it properly after each use. Store it upright in a clean holder. Be diligent about daily brushing to remove new mold growth.

Step 4: Improve Storage Conditions

Review how you store your Oral-B toothbrush. Make sure you allow it to air dry completely before putting it into the holder. Keep your toothbrush separate from others. Clean the holder weekly.

How Often Should You Replace Your Toothbrush?

Dentists generally recommend replacing your manual or electric toothbrush head every 3 to 4 months, or sooner if the bristles appear frayed. The ADA suggests replacing your toothbrush after you have recovered from a cold, the flu, or other illness that may harbor germs.

Here are some other signs it’s time to replace your Oral B toothbrush:

  • Bristles are visibly worn, frayed or bent out of shape
  • Handle is cracked or showing other signs of wear
  • You notice mold growth on bristles or handle
  • Toothbrush is 3-4 months old
  • After recovering from a viral or bacterial illness
  • You’ve shared the toothbrush with someone else who is sick

Some additional factors may warrant more frequent toothbrush replacement, such as:

  • You have compromised immunity or a chronic illness
  • You are undergoing cancer treatment or transplant therapy
  • You have existing dental issues like gingivitis
  • You use tobacco products

For optimal oral hygiene, stick to the recommended toothbrush replacement schedule. Mark your calendar every 3-4 months as a reminder to swap in a fresh brush.

Toothbrush Replacement Schedule

Replace Toothbrush Reason
Every 3-4 months Regular wear
After illness Prevent reinfection
When bristles become frayed Reduced cleaning efficacy
When mold appears Mold & bacteria buildup
When handle cracks Difficult to hold & clean

Toothbrush Storage Recommendations

In addition to replacing your toothbrush regularly, proper storage habits help prevent mold growth. Follow these tips from the ADA for keeping your toothbrush fresh between uses:

  • Rinse off bristles thoroughly and allow to air dry after each use before storage.
  • Store upright with bristles facing up for ventilation and drainage.
  • Use open-air holders, not closed containers or travel cases.
  • Don’t tightly pack multiple toothbrushes together.
  • Keep your toothbrush separate from those belonging to others.
  • Store at least 6 feet from the toilet to avoid airborne bacteria.
  • Clean holder weekly.

Recommended Toothbrush Storage

Good Storage Poor Storage
Upright in open holder Lying flat or upside down
In separate holders Crowded together in one holder
On counter away from toilet Inside a closed medicine cabinet
Open to air Enclosed in travel case or container

Toothbrush Sanitizing Techniques

While thorough daily rinsing removes most dirt and germs, you may wish to periodically disinfect your Oral B toothbrush further. Some options include:

Hydrogen Peroxide

Soak your toothbrush head for 1-2 minutes in a 3% hydrogen peroxide solution. Rinse afterwards with water. Peroxide helps kill bacteria and mold.

Listerine or Mouthwash

After brushing, place bristles in mouthwash for 30 seconds. Listerine and other antiseptic mouthwashes have disinfectant properties.

Denture Cleaner

Use non-bleaching denture cleansing tablets or solutions to periodically deep clean your toothbrush. Follow product label directions.

Baking Soda

Create a paste using baking soda and water. Gently rub it onto the toothbrush bristles for 2-3 minutes to help remove debris.


Soak the toothbrush in undiluted white vinegar for 30-60 minutes, which has antibacterial properties that break up tartar and kill germs.

Boiling Water

Briefly hold the toothbrush bristles under hot running water for 10 seconds. Boiling water kills most microorganisms.

UV Toothbrush Sanitizers

A UV sanitizing device uses ultraviolet light to kill up to 99% of bacteria. However, studies show no added benefits compared to regular brush rinsing.

Choosing an Antimicrobial Toothbrush

Antimicrobial toothbrushes contain additives that help inhibit microbial growth. Silver ions, triclosan, and chlorhexidine are antibiotics commonly added to toothbrush bristles.

Oral B Pro-Health Toothbrushes

The Oral B Pro-Health line includes bristles treated with stannous fluoride for antimicrobial action against bacteria. Models include complex bristles designed to penetrate between teeth.

Colgate Total Toothbrushes

Colgate Total bristles are treated with triclosan, an antibacterial agent that has been shown to reduce bacteria on toothbrush surfaces. It provides 12-hour defense against germs.

ACT Anticavity Fluoride Toothbrush

This budget-friendly brush uses premium tapered bristles to clean teeth while releasing fluoride to strengthen enamel and help prevent cavities.

Philips Sonicare ProResults Toothbrush

With contoured bristles and sonic technology, this rechargeable electric brush makes over 60,000 sweep strokes per minute to break up plaque.

Toothbrush Mold Prevention Tips

Here are some key tips to remember for preventing mold on your Oral B toothbrush:

  • Rinse off your toothbrush thoroughly after brushing and allow to air dry.
  • Store upright in an open holder, not an enclosed case.
  • Clean your toothbrush holder weekly.
  • Replace your toothbrush every 3-4 months.
  • Buy a toothbrush with antimicrobial bristles.
  • Never share your toothbrush with other people.
  • Discard immediately if you see any mold.


Toothbrush mold thrives in moist, enclosed environments. With proper care and storage, it’s easy to prevent mold from growing on your Oral B toothbrush. Rinse thoroughly after each use, allow to air dry, and store upright in a clean, open holder. Replace the toothbrush every 3-4 months or sooner if bristles appear frayed. Antimicrobial toothbrushes provide added protection against germs. Discard immediately if any mold appears.

Practicing good toothbrush hygiene keeps your mouth healthy and lets you get the most out of your Oral B electric or manual toothbrush. With the right habits, you can stop mold in its tracks and keep your toothbrush fresh.

1 thought on “How do I keep mold off my Oral B toothbrush?”

  1. My electric toothbrush is majorly prone to growing mold, despite my diligent cleaning and drying. My husband’s, stored at the exact same sink, never grows mold, and he almost never cleans it. The only difference is our toothpastes. I can’t believe my toothpaste encourages mold growth – it’s mostly baking soda with mint and clove oil, but maybe the fluoride in his prevents it? I can’t think of any other cause. It’s very humid here, so storing it in a different room wouldn’t make a difference. I have a compromised immune system, so I have to stay on top of these things, and it feels like I’m always getting kicked back down!


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