I think they should examine the UV sanitizers they sell in stores that supposedly sanitize your toothbrushes. They should also visit all the different ways people say to do in order to clean them.

Why would they need to test the UV sanitizers? UV light is proven to kill bacteria over time.

Actually, the test they already did on the show was better because they showed that, in spite of the bacteria on toothbrushes (which were also on the ones kept away from the bathroom), we're not in danger from it at all.