Various studies have been undertaken to look at the general effectiveness of toothbrush sanitizers, with several of these studies showing that those who use toothbrush sanitizers have far fewer bacteria present on their toothbrush heads each day, resulting in a better clean, fresher breath, and lower chances of introducing bacteria into the mouth with each brush. These devices are designed to make use of UV light that has been scientifically proven to kill bacteria, viruses, and other pathogens in a matter of minutes, so it's clear to see that they are effective in terms of cleaning up your brush and making it safer to use each day.