Even though the bathroom is often the smallest room in the house, it is usually the largest breeding ground for unhealthy mold. The reason? Mold loves damp, dark places, and with the combination of steamy showers and lack of lighting, you've got the perfect environment for it. To keep your bathroom healthy, be sure to use the bathroom ventilation. When you are showering and taking a bath, keep the ventilation running the entire time. And when you are done, keep it going for at least 30 minutes to properly remove the excess moisture from the air. Keep the shower free of loofahs, kids' toys and even bottles of shampoo; all of those nooks and crevices are perfect spots for mold to grow and thrive.