Before we pack our bags, lock the doors, or set the alarm, most of us are diligent about vacation prep. We clean out the fridge, double-check the windows, turn off the water heater, and set the thermostat. But there’s one spot in the home that often gets overlooked—and ignoring it can come back to haunt you.

That spot? The kitchen sink.

It might seem harmless, but leaving your sink unchecked before going on vacation could mean coming home to a foul odor, stagnant moisture, or worse—pests crawling up from your pipes.

Thankfully, there’s a simple, completely free trick you can do in seconds before you head out the door. And it’s so effective, even professional plumbers and home inspectors recommend it.

Why Your Sink Becomes a Problem When You’re Away
While you’re off enjoying sandy beaches or mountain views, your home is sitting still—and so is your plumbing.

In particular, the water inside your drain trap—that curved section of pipe under your sink—can begin to evaporate, especially in warm, dry weather or homes with central heating or air conditioning. That water seal is what blocks sewer gases from rising up through the pipes.

When it disappears?
The smell of sewage can fill your kitchen or bathroom.

And it’s not just smells. The dark, damp drain becomes an open invitation for:

Ants
Gnats and fruit flies
Cockroaches
Drain flies
These bugs don’t need an open window—they can come up through the pipes if the trap dries out. And they’ll happily take over while you’re away.

The Upside-Down Glass Hack: A Brilliant Barrier
Here’s the trick that professionals swear by, and it couldn’t be easier:

Take a paper towel (toilet paper or napkin also works).
Lay it across the drain of your sink.
Place an upside-down glass or cup on top of the towel, directly over the drain opening.
That’s it.

You’ve just created a natural, airtight barrier that keeps odors and insects from getting out—and keeps your kitchen fresh and clean until you return.

Why It Works So Well
Unlike sink stoppers, which can shift out of place or fail to form a complete seal, the paper towel + glass method:

Requires no pressure or suction
Doesn’t warp or dry out like rubber
Can’t be accidentally dislodged
Creates a physical, visible block to both air and pests
It’s a low-tech solution to a high-stress problem. And best of all? It’s totally free.

A Pre-Vacation Sink Routine That Actually Works
If you want to go the extra mile and give your home a truly fresh start before you leave, here’s a five-minute sink prep routine that’ll make a world of difference:

Step-by-Step:
Scrub the sink basin with soap and warm water, paying close attention to the drain and edges.
Pour hot white vinegar down the drain. Let it sit for an hour or two to kill bacteria and loosen gunk.
Rinse with warm water to flush out anything the vinegar broke down.
Rub a cut lemon (or a few drops of lemon essential oil) over the drain opening for a light, fresh scent.
Dry the area completely—especially the drain rim.
Place a clean paper towel over the opening.
Cover with an upside-down glass or mug.
Now you’re ready to enjoy your vacation knowing that your sink won’t be the source of any unpleasant surprises.

What About Sink Stoppers or Drain Plugs?
You might be wondering, “Why not just use the built-in stopper?”

Fair question.

The truth is, most sink plugs weren’t designed for long-term sealing. They can dry out, shift, or lose their tight fit over time—especially if your home gets warm while you’re gone.

And while they might reduce odor, they don’t stop insects, especially the smaller ones that can squeeze through microscopic gaps.

The upside-down glass?
It’s heavy enough to stay put. Light enough not to damage anything. And simple enough to be foolproof.

Bonus: Works for Bathroom Sinks, Too
This trick isn’t just for the kitchen. You can use it in:

Bathroom sinks
Guest bathrooms
Bidets
Utility sinks or laundry tubs
Any drain that won’t be in use for several days could benefit from this barrier.

And the best part? No special tools, no harsh chemicals, and no extra cost.

A Vacation is Great—But So Is Coming Home to a Fresh House
You’ve spent time and money planning your getaway. You deserve to walk into a house that feels just as you left it—clean, calm, and pest-free.

Thanks to one small hack—something as simple as a paper towel and a drinking glass—you can skip the musty smells, the sticky drain gunk, and that awful moment when you spot a roach near your sink.

Instead, you’ll return to a peaceful, fresh-smelling home.

Because sometimes, the smartest home hacks are the simplest ones. And in this case, it’s the cheapest trick that could save you from the most unpleasant surprises.