Most people replace their toothbrush every three months or so without giving the old one a second thought; straight into the bin it goes. That’s a bit of a missed opportunity, because a worn-out toothbrush, bristles frayed and all, actually turns into one of the most versatile cleaning tools you can own, small enough to reach places a sponge or cloth never will, and firm enough to scrub away grime that would otherwise need real effort. Before you toss the next one, it’s worth setting it aside for cleaning duty instead, dedicated entirely to household chores and clearly kept apart from anything used for personal hygiene. Here are seven places around the house where an old toothbrush genuinely earns its keep.