When the brush is dropped
You know, the bathroom is always the place where bacteria gather the most. No matter how clean you are, the most "dirty" place in the house is the bathroom. Therefore, when you drop your toothbrush, even if it's just for a few seconds, it's enough time for them to be contaminated by bacteria. Immediately, change your toothbrush if you do not want to introduce bacteria into your body through the toothbrush.

When the brush head comes into contact with someone else's brush

Many families have the habit of sharing each other's brushes in one place. One person's brush touches the other's brush without even noticing or knowing it. We always have the mentality that close friends are not afraid of dirt, fear of spreading each other's bacteria. But in fact, bacteria "don't mind each other". When you put two brushes in contact, it is a great bridge for dozens of bacteria of both to be exchanged. And if at least this person has dental disease, colds, fever, then it is obvious that you are also infected.
Replace the brush immediately if you see this sign.
When placing the brush in an enclosed, humid space

As mentioned, bacteria are very easy to multiply in a closed and hot and humid environment. Even when placed in the bathroom, you should also put them in an open, high position and should have a lid. In case you travel, go out, go away for many days, put the brushes in a box with an opening and take them out as soon as they arrive. Remember to clean the brush from time to time, let it dry to ensure as little harmful bacteria as possible.
When you just woke up
And of course, while you're sick you still use your toothbrush. After getting sick, you should change it. At this time, the bacteria still clings to the brush. To be careful with your health and that of your loved ones, changing your toothbrush is necessary.
How to keep your brush clean?

Cleaning the toothbrush between uses doesn't have to be complicated. You just need to use hot water to wash the brush is enough.
If you're extra careful, you can soak the brush in mouthwash or denture cleaner that will also help remove any harmful bacteria.
After cleaning, it is best to let the brush stand upright and dry naturally in the air.
In short you need to remember, for good maintenance of a toothbrush, it is necessary:
– Replace brush after 3 months of use.
– Wash your hands with soap and water before brushing your teeth to prevent microorganisms from dirty hands from going directly to the brush.
– Disinfect the toothbrush well after use: for best results, it is best to dip the toothbrush into a glass containing cetylpyridynium chloride and chlorhexidine. After 30 minutes, rinse thoroughly with water and dry thoroughly.
– When brushing teeth, it is convenient to leave the brush in a ventilated and upright place to dry.
– Preventing the brush from coming into contact with the brushes of other family members also limits the transmission of pathogens.
For children under 7 years old, do not use electric toothbrush
– Although electric toothbrushes are good, but for young children, their gums are still soft and will not withstand the strong impact of an electric toothbrush.
– In addition, young children, especially those under 7 years old, will be very active and self-conscious. In the case of children holding the brush and pressing hard on a place on the teeth, for a long time will cause enamel wear and gum damage.
– Therefore, mothers should not let children under 7 years old use electric toothbrushes, but should only use ordinary brushes.
According to Family and Society