When preparing for a vacation, most people handle the usual tasks—adjusting the thermostat, clearing out the refrigerator, watering plants, and making sure all doors and windows are locked. However, one commonly overlooked detail can lead to an unpleasant surprise upon returning home: the sink. When a house sits empty for days or weeks, the plumbing isn’t used, and that stillness can create unexpected odors.
Under every sink is a P-trap, the curved pipe that holds a small amount of water. This water acts as a protective seal, blocking sewer gases and insects from traveling back up through the drain. While daily use keeps this water barrier fresh, it can gradually evaporate when no one is home. Once that happens, odors may drift into the room, and the sink can become a source of discomfort.
A simple and cost-free method can prevent this issue. Place a paper towel over the drain, then set an upside-down glass on top. This creates a breathable barrier that helps block unpleasant smells and keeps insects from entering the drain. Unlike rubber stoppers, which can warp or slip, a glass stays secure and allows just enough airflow to avoid moisture buildup.
For even better results, clean the sink before you leave. Rinse it with hot water, pour a small amount of vinegar down the drain to cut through residue, and dry the basin thoroughly. Then apply the paper towel and glass trick. This quick, hassle-free step can make a big difference when you return home, helping your space smell clean and fresh instead of musty. Sometimes the smallest preparations have the biggest impact.