We've been told that we should replace our toothbrushes every three months. Seems like a bit of a waste though, right? Instead of tossing them out, put them to good use as a cleaner for your razor.
Most electric razors come with a tiny, easily lost brush that you can use to dust hairs out. Disposable razors don't come with one at all. In either case, having a toothbrush around can give you a more heavy-duty option to keep your blades clean, which will extend the life of your razor.
Just be sure to clean your old toothbrush thoroughly, because bacteria can build up on the frayed bristles.