Your toothbrush requires more attention than the handful of minutes you spend twice each day using it.
Appropriate toothbrush care and maintenance are important to maintaining good oral hygiene. The American Dental Association has a number of recommendations consumers should heed:
Do not share your toothbrush. This could result in an exchange of body fluids and/or microorganisms between users, placing them at an increased risk for infections. It’s a particular concern for people with compromised immune systems or existing infectious diseases.
Thoroughly rinse your toothbrush with tap water after brushing to remove any remaining toothpaste or debris. Store the brush in an upright position if possible and allow the toothbrush to air dry until you use it again. If more than one brush is stored in the same holder or area, keep the brushes separate to prevent cross-contamination.
Do not routinely cover toothbrushes or store them in closed containers. A moist environment such as a closed container is more conducive to the growth of microorganisms than the open air.
Following these tips can get you on your way to having a clean, sanitary toothbrush. There is no clinical evidence that soaking a toothbrush in an antibacterial mouth rinse or using a commercially available toothbrush sanitizer has any positive or negative effect on oral or systemic health.