I actually posted this in another earlier today. Then I saw your subject so I'll share what I do regarding toothbrushes. "It pays to read each subject posting because it can easily move into another subject. As far as the toothbrushes, here is what I do. I run hot water over it, flick the excess water off and then dip in hydrogen peroxide. After brushing I rinse the toothbrush under hot water, then hydrogen peroxide before returning to the holder.
Another thing I do, when I first get up I rinse with Peroxal (check out the foam it creates first thing in your mouth) then rinse out with bottle water. Feel like I'm killing all kinds of germs." Best to you as you stay diligent.