The Purpose of the Small Hole in Your Sink

The small hole near the faucet serves an important purpose: it prevents overflow. If the water level rises too high (e.g., when the faucet is left on), the hole drains excess water into the pipes, avoiding flooding.

However, this hole can trap bacteria and mold, causing unpleasant odors. To clean it:

Mix vinegar and baking soda.
Pour the mixture into the hole and wait 5–10 minutes.
Flush with warm water.
This simple cleaning keeps your sink fresh and odor-free.