Most bathroom sinks feature a small hole located near the faucet, which many people may find puzzling or question its purpose.
This modest hole, usually situated about one-third of the way up the basin, is actually a smart design element. It’s connected to the drainage pipe below and serves a crucial function. If users accidentally leave the faucet running—such as when stepping away to answer a phone call—the water level will rise and eventually drain through this hole once it reaches about two-thirds of the sink. This prevents water from spilling over and potentially flooding the bathroom floor.
However, this overflow hole can also be a breeding ground for bacteria and mold, which may lead to unpleasant odors. To tackle this issue, if you detect a foul smell coming from the hole, you can clean it effectively by mixing vinegar with baking soda and pouring the mixture into the sink’s overflow hole.
The reaction between the vinegar and baking soda will help break down grime in the pipes within 5 to 10 minutes. Afterward, flush the sink with warm water to rinse away any remaining residue. This simple cleaning routine will help keep your bathroom smelling fresh and clean.