Every dentist ever has asked his or her patient to change their toothbrush at least once in a month. Most of us have not followed up the rule diligently, the repercussions of which come out in various ways we choose to ignore. Until you make it to the lucky few who rarely get an oral health issue.
The bristles of your toothbrush are what pick out the leftovers of your last meal from your teeth. The further apart they spread, the less effective it gets at its job. And if you are the type who buys the whole departmental store but forgets basic toiletries like toothpaste, conditioners, and toothbrushes (happens to the best of us), then here's a remedy till you go shopping next time.
All the ingredient you'll need is hot water. That's right. All you need to do is boiled, hot water and a bowl.
Now, swirl the toothbrush around and voila! The bristles are now together and as good as new!