When preparing for vacation, we usually think of the obvious—booking flights, packing bags, setting the GPS, and making sure the plants get watered. But there’s one small, often overlooked detail that can prevent a very unpleasant surprise when you return:
Placing an upside-down glass over a piece of paper in your kitchen sink.
This may sound unusual, but it’s a smart, time-tested tip recommended by professionals. And it could be the key to coming home to a fresh, clean-smelling kitchen instead of one filled with odors or pests.
Why Your Sink Becomes a Hidden Risk During Vacation
Even if you’ve locked your doors, shut off the water, and emptied the fridge, the sink is often forgotten. However, it’s directly connected to your home’s plumbing—and when left inactive, it can cause the following issues:
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Foul odors rising from the pipes
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Insect invasions (ants, cockroaches, drain flies)
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Humid conditions that invite bacteria or mold
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Evaporation of water in the siphon, removing the natural odor barrier
These issues are especially common during summer or long absences.
How the Upside-Down Glass Trick Works
The method is simple:
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Clean the sink
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Place a sheet of paper towel over the drain
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Cover it with an upside-down glass or sturdy cup
This creates a physical and air barrier that prevents odors, insects, and gases from entering the kitchen through the drain.
According to Loïc, a plumber with over 18 years of experience:
“Before leaving, I recommend my clients clean their sink, treat it with hot white vinegar, and cover the drain with a glass over paper. It prevents most of the issues I deal with each summer.”
Step-by-Step Guide to Protect Your Sink
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Clean the sink thoroughly, including the drain edges and basin.
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Pour 2–3 liters of hot or boiling white vinegar down the drain. Let it sit for several hours or overnight.
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Rinse with hot water the next day to flush the pipes.
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Rub the drain area with half a lemon for natural fragrance and odor neutralization.
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Dry the sink completely.
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Place a sheet of absorbent paper (like a paper towel) over the drain.
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Cover the drain with an upside-down glass, making sure it seals the area completely.
What If You Have Two Sinks or a Bathroom?
Repeat the same process for every drain in the house—this includes double kitchen sinks, bathroom sinks, and even bidets. Any unused drain during long vacations can pose similar risks.
Why Not Just Use a Sink Stopper?
Sink stoppers may not be fully airtight. They can dry out, shift out of place, or fail due to temperature changes. A glass and paper barrier provides a stable, low-pressure seal that blocks odors and pests more effectively.
Cost-Free, Chemical-Free, and Safe
This method is:
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Environmentally friendly – no harsh cleaners required
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Completely free – uses items you already have at home
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Safe for pets and children – no chemical exposure
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Easy to combine with natural disinfectants like vinegar, lemon, or baking soda
The Small Trick That Makes a Big Difference
Imagine returning from a long vacation, walking into your home, and being greeted not by the fresh scent of home—but by a foul odor from the sink.
Now imagine walking into a kitchen that smells exactly like it did when you left.
That’s the power of one upside-down glass and a piece of paper.
Your Final Vacation Checklist
Before heading out, make sure you’ve checked:
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Passports
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Travel documents
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Sunscreen and toiletries
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Fridge emptied
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Plants watered
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Lights and appliances turned off
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Glass over paper towel in the kitchen sink
In Conclusion
This isn’t just an old wives’ tale—it’s a practical, tested tip that saves time, prevents headaches, and ensures your return home is as pleasant as your departure. So next time you pack your bags, don’t forget this small step. Because it’s not just a glass. It’s peace of mind.
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