Do you thoroughly wash your toothbrush after you brush your teeth? You may not actually need to be so diligent about keeping it clean. Toothpaste has some antibacterial properties, so leaving a little toothpaste residue on the bristles can help prevent germs and bacteria from building up. Just give the brush a rinse under water before using, and don't worry about washing it out completely when you've finished.
ANDREWS MCMEEL SYNDICATION