Homes are full of so many weird and quirky details, many of which have become so familiar you don’t even think about them. Then one day, you’re brushing your teeth and begin to wonder, “Why is there a tiny hole in every bathroom sink?” It turns out that small hole is not there by accident. Typically located right near the upper rim, the hole is technically referred to as the overflow drain. That already tells you a lot about its purpose. The overflow drain’s job is to keep the sink from overflowing should you forget to turn off the faucet while the drain is closed. When the water rises to the hole, it begins draining instead of overflowing onto the bathroom floor. While the hole’s primary purpose is to prevent flooding, it also helps the sink drain more quickly. Essentially, the overflow channel lets air into the drain system, which reduces suction and allows water to go down the drain more quickly. Unfortunately, the tube that leads to the overflow hole is a great trap for soap scum, toothpaste, beauty products, and mold — all of which can get pretty smelly. A simple mixture of baking soda and vinegar can help break up any buildup. Then flush it down with hot water. You can use a small brush or even a cotton ball around the hole to get rid of any gunk there.
