Before heading out on a well-deserved vacation, most people run through a checklist of to-dos: lock the doors, unplug appliances, adjust the thermostat, and water the plants.

But there’s one small detail often overlooked that can make a surprising difference when you return—something as simple as placing an upside-down glass and a sheet of paper in the sink.

It might sound odd at first, but this clever trick is backed by practical reasoning and can save you from returning to unpleasant surprises.

When a home is left empty for several days or more, especially during warmer seasons, the plumbing system doesn’t get the regular water flow it needs.

Over time, this lack of activity can cause the water in the traps of your sink drains to evaporate. That water normally serves as a protective seal, preventing sewer gases from rising into your living space. Without it, foul smells from the pipes can seep into your kitchen or bathroom, making your once-fresh home feel musty and unclean the moment you return.

Even more concerning, stagnant drains can become a magnet for pests. Insects like cockroaches, ants, and drain flies are attracted to the warm, moist environments inside unused drains.

These bugs can make their way into your home through the pipes and establish nests while you’re away—especially if you’ve left behind any food crumbs or organic debris.

Fortunately, there’s a simple solution that takes less than a minute: after thoroughly cleaning your sink, place a dry paper towel over the drain and gently set an upside-down glass on top.

This acts as a temporary barrier, preventing both odors and insects from emerging. Unlike traditional sink stoppers, which can shift or degrade over time, the glass and paper combo remains secure and requires no special sealing or tools. It’s cost-free, reusable, and surprisingly effective.

For an even more thorough prep before applying this trick, experts recommend pouring a cup of hot white vinegar down your sink. Let it sit for a few hours to break down grease, grime, and any lingering bacteria. After that, rinse with warm water and rub a lemon wedge around the drain to add a natural, fresh scent.

Once dry, cover the drain with the paper and glass, and your sink is ready to stay protected throughout your absence.

You might wonder why this simple method is better than a store-bought drain cover or plug.

While sink stoppers are convenient for daily use, they often don’t hold up well under heat changes, can shift during cleaning, or degrade with time. For short getaways, they may suffice—but for longer trips, the inverted glass offers a more reliable barrier with no need for suction or maintenance.

This little-known hack has been shared among seasoned travelers, RV owners, and home maintenance pros for years.

It might not appear in mainstream travel prep lists, but those who’ve used it swear by its effectiveness. When you return from a restful vacation, the last thing you want is to be greeted by the sour stench of sewer gas or discover that ants have made your kitchen their new home. Taking this tiny step ensures that your home remains just as you left it—clean, calm, and welcoming.

Vacations are meant to refresh your mind, not cause stress upon return. By including this one extra step in your departure checklist, you add a layer of protection that’s both practical and preventative. It’s a small act of foresight that promises peace of mind.

After all, who knew that a single glass and a piece of paper could serve as such a quiet hero in home maintenance?

So, next time you’re heading out for more than a day or two, remember: cover your sink, protect your home, and travel worry-free. You’ll thank yourself when you walk back through your front door and breathe in nothing but fresh air.