Bathmats Are Nasty
We’ve never thought about it too hard before, but bathmats are rather gross. Think about it; they sit on your bathroom floor. You may keep your bathroom floor very clean, but icky things happen in that room, and germs fly all over the place. And most of them land on your floor.
That’s why you should wash your bathmat at least once a week, more often if multiple people use your loo (for example, if you’re living with roommates). If it has a rubber backing, wash it a little less frequently and don’t put it in the dryer; the backing won’t last you very long otherwise. And wash your mats in hot water to sanitize them.