Many people only replace their toothbrush once or twice a year, but think about it: it shares a room with your toilet. It should be replaced every 3-4 months. Over time, pillows become sullied with dust mites. Up to a third of your pillow’s weight can be made up of: bugs, dead skin, and dust mite feces. To be safe, pillows should be replaced every 3-4 years. A loofah’s nooks and crannies make them the perfect breeding ground for bacteria, and they should be replaced every 3 weeks. Watch the clip for the full list. Basically, everything you own is disgusting.