Fortunately, there’s a simple, no-cost trick that helps prevent all of that.
By placing a paper towel over the drain and setting an upside-down glass on top, you create a physical barrier that blocks sewer gases, moisture, and insects from coming up through the pipes. The paper towel helps seal the opening, while the weight of the glass keeps everything in place.
This method is often more reliable than standard sink stoppers, which can dry out, lose suction, or shift over time—especially during longer absences. The glass doesn’t rely on a perfect seal and won’t move easily once set.
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To prep your sink properly before leaving:
