Be sure your toothbrush is dry before putting it in the protector or case. Also, be sure to clean your toothbrush protector regularly.
[header] How to keep a clean toothbrush [title] Do not store your toothbrush in a closed container at home. [step] The greater moisture in a closed container creates a good environment for the growth of bacteria. [substeps] Keep your toothbrush in a container when you travel to avoid it picking up dirt or bacteria.