Have you ever seen someone place a sheet of paper over the kitchen sink drain and then set an upside-down glass on top before leaving for a trip? At first glance, it seems like an odd household trick. However, this simple method has been passed down through generations because it can help prevent a few common problems while you’re away.
But does it really work? Let’s explore the reasons behind this unusual vacation hack.
The Idea Behind the Trick
When a home sits empty for several days or weeks, the plumbing system isn’t being used. During that time, odors, insects, and even small pests can sometimes find their way through drain openings.
By covering the drain with paper and sealing it with an upside-down glass, you’re creating an extra barrier between your home and the drain below.
While it isn’t a foolproof seal, it may help reduce unwanted surprises when you return.
1. It Helps Reduce Drain Odors
One of the biggest reasons people use this trick is to minimize unpleasant smells.
Kitchen drains often contain food particles, grease, and bacteria. Even if the sink looks clean, the drain can develop odors while you’re away.
The paper and glass help block some of these smells from escaping into your kitchen.
For longer vacations, this can make a noticeable difference when you come home.
2. It May Discourage Insects
Many insects are attracted to moist, dark drains.
These include:
- Fruit flies
- Drain flies
- Small cockroaches
- Ants (in some homes)
The glass creates a physical obstacle that makes it harder for insects to emerge through the drain opening.
While it won’t eliminate an existing infestation, it can help reduce the chance of pests entering through that route.
3. It Helps Keep Dust Out
If you’re away for several weeks, dust can settle inside open drains.
Although this isn’t a major issue, covering the drain keeps the opening cleaner until you return.
4. It Reminds You Not to Use the Sink
Some homeowners intentionally leave the sink prepared before a trip.
Seeing the paper and glass reminds family members that the sink has already been cleaned and shouldn’t be used before leaving.
It’s a simple visual cue.
5. It Can Add a Small Extra Barrier Against Evaporation
Every drain contains a U-shaped pipe called a P-trap.
This trap normally holds water that blocks sewer gases from entering your home.
During very long absences—especially in hot, dry climates—the water in rarely used drains can slowly evaporate.
While the paper-and-glass trick won’t stop evaporation completely, it may slightly reduce airflow over the drain opening, helping slow the process.
For vacations lasting several weeks or months, it’s also a good idea to pour a little water into rarely used drains before leaving.
Why Use Paper?
The paper serves two purposes:
- It provides a flat surface for the glass to sit on.
- It helps create a slightly better seal around the drain opening.
Some people use:
- Paper towels
- Printer paper
- Napkins
The exact material isn’t especially important.
Why Turn the Glass Upside Down?
An upside-down glass traps air inside and covers the drain opening more effectively than placing the glass upright.
The weight of the glass also helps keep the paper from shifting.
Is This Trick Scientifically Proven?
Not entirely.
There is little scientific research specifically testing this household method. However, the principle behind it is reasonable:
- Covering an opening limits airflow.
- Less airflow can reduce odors.
- A physical barrier may discourage insects from emerging.
Think of it as a simple preventive measure rather than a guaranteed solution.
Even Better Things to Do Before Leaving on Vacation
If you’re going to be away for several days, consider these additional steps:
- Clean the sink thoroughly.
- Run the garbage disposal with ice and citrus peels (if you have one).
- Pour water into all floor drains and rarely used sinks.
- Empty trash bins.
- Remove food scraps from the kitchen.
- Store fruits and vegetables properly.
- Check that all faucets are turned off.
- Close windows if severe weather is expected.
These habits can help prevent odors, pests, and plumbing issues while you’re away.
Does This Trick Really Work?
For many homeowners, yes—at least to some extent.
It won’t solve plumbing problems or stop every insect, but it can:
- Reduce drain odors
- Add a simple barrier against pests
- Keep the drain cleaner
- Offer peace of mind while you’re traveling
Since it costs virtually nothing and takes only a few seconds, many people feel it’s worth trying.
Final Thoughts
The paper-and-glass sink trick is one of those old-fashioned household tips that continues to be shared because it’s simple, inexpensive, and may help reduce odors and discourage insects during a vacation. While it’s not a substitute for proper plumbing maintenance or pest control, it can be a practical extra step before locking the door and heading off on your trip.
Sometimes, the simplest home hacks are the ones that stick around for generations—not because they’re magical, but because they’re easy to do and may provide a little extra protection when your home is sitting empty.