Before heading out on vacation, many people want to make sure their home stays fresh and problem-free. A viral tip suggests placing a piece of paper and an upside-down glass over a sink drain to block odors and insects. While creative, this method doesn’t fully address how household plumbing actually works.
Every sink, tub, and floor drain is designed with a curved section of pipe that holds water. This water creates a seal that blocks sewer gases and pests from entering your home. When a drain isn’t used for a long time, that water can slowly evaporate, breaking the seal. Short trips usually aren’t an issue, but longer absences—especially in hot or dry conditions—can allow evaporation to occur.
The paper-and-glass trick aims to slow evaporation, but it rarely forms a tight seal. Paper can absorb moisture, shift out of place, or fall into the sink, while a glass can be easily knocked loose. Without an airtight barrier, evaporation continues and odors may still escape. A more reliable approach is simple.
Before leaving, run water for several seconds in every sink, shower, tub, and floor drain, and flush all toilets. This refreshes the water seals. For added protection, close sink stoppers or cover drains with snug silicone covers. For extended trips, a small amount of mineral oil poured on top of the water can slow evaporation. The most effective solution isn’t a clever hack—it’s understanding how your plumbing works. Proper preparation keeps your home fresh and avoids unpleasant surprises when you return.
