Why You Should Always Leave an Upside-Down Glass and a Piece of Paper in the Sink Before Going on Vacation

Before heading off on a trip, most of us double-check everything — we turn off the water, empty the fridge, and set the alarm. But there’s one small spot that often gets overlooked: the sink.

Ignoring it might seem harmless, but it can lead to unpleasant surprises like bad odors, dampness, or even tiny insects. Thankfully, there’s a smart, free, and easy trick that experts recommend to avoid these problems: place a paper towel over the drain and cover it with an upside-down glass. This simple move can make a big difference while you’re away.

Why the Sink Can Cause Trouble When You’re Away

When your house sits empty for several days—especially in warm weather—your plumbing can dry out. Without regular water use, the traps in your pipes can lose their seal, allowing unwanted smells to drift into your home.

A Simple Routine Before You Leave

Here’s how to prepare your sink before you lock up the house:

1. Clean the sink well, including the edges and the drain area.

2. Pour hot white vinegar down the drain and let it sit for a few hours.

3. Rinse it with warm water.

4. Rub a slice of lemon over the drain to leave a light, fresh scent.

5. Dry the area completely.

6. Lay a sheet of paper towel over the drain.

7. Place an upside-down glass or cup on top of it.

That’s it. You’ll leave knowing your sink is taken care of—and you’ll have one less thing to worry about on your trip.

Why Not Just Use a Regular Stopper?

It’s a fair question. Traditional sink plugs can loosen, shift, or even change shape with heat over time. They’re not always reliable, especially if you’ll be away for more than a few days.

An upside-down glass, on the other hand, doesn’t depend on a tight seal. It simply creates a quiet, stable barrier that works surprisingly well.

Smart, Eco-Friendly, and Free

• Environmentally friendly: No need for harsh chemicals.

• Free: Uses items you already have at home.

• Versatile: Works for bathroom sinks and bidets too.

• Safe: Gentle on pipes and surfaces.

The Science Behind This Clever Trick

This little hack actually makes sense once you understand how your plumbing works.

Every sink has a curved pipe underneath, called a trap, that holds a small amount of water. That water acts as a natural seal, blocking odors and gases from rising through the drain.

But when you leave for several days, especially in warm weather, that water can slowly evaporate, breaking the seal and allowing smells—or even tiny bugs—to escape into your home.

By covering the drain with a paper towel and an upside-down glass, you’re slowing down air circulation, which helps keep moisture inside and prevents unwanted smells from spreading.

It’s simple physics: less airflow means less evaporation—and a fresher home when you return.

If You’ll Be Away for a Long Time

If your trip lasts more than two or three weeks, you can take one extra step for longer protection:

1. After cleaning the sink and rinsing it with vinegar and lemon, pour about one tablespoon of cooking oil or mineral oil into the drain.

2. The thin layer of oil will sit on top of the water inside the trap, acting as a barrier to stop evaporation completely.

3. Then, cover the drain with paper and the upside-down glass as usual.

This tiny upgrade keeps the trap sealed for weeks, protecting your home from odors, moisture, and insects—without any chemicals or complicated steps.

The Tiny Trick That Makes Coming Home Better

Imagine this: after a long trip, you open your front door and breathe in fresh, clean air. No musty smell, no moisture, no unwanted bugs—just a calm, comfortable space waiting for you.

That little trick with the upside-down glass may be small, but it makes all the difference. Because sometimes, the best part of a vacation isn’t just the journey—it’s coming home to a house that feels exactly the way you left it.