We all know the routine before a vacation: lock the doors, set the alarms, unplug appliances. But there’s one simple, often-overlooked trick that can save you from coming home to nasty surprises—placing an upside-down glass and a piece of paper in your sink.
Why This Hack Works
1. Prevents Dry Drain Traps & Sewer Gas
Your sink’s P-trap (the U-shaped pipe under it) holds water to create a seal, blocking sewer gases from rising into your home. If you’re away for weeks, that water can evaporate, breaking the seal and letting foul odors (or even pests) in.
- The glass trick: Flipping a water-filled glass upside-down slowly releases water, keeping the trap sealed.
- For longer trips: Add a teaspoon of mineral oil to slow evaporation even more.
2. Acts as a Leak Detector
A sheet of paper (tissue, paper towel, or even a napkin) placed under the glass serves as a silent alarm.
Paper shredder
Sink stopper
- If pipes leak while you’re gone, the paper will show water stains—alerting you to check for hidden damage.
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3. Deters Pests
A dry drain is an open invitation for insects, rodents, or even snakes to crawl up. Keeping the P-trap moist helps block their entry.
How to Do It Right
Step 2: Place a dry piece of paper in the sink.
Step 3: Turn the glass upside-down over the paper.
Step 4: Repeat for every sink & shower drain in the house.
Bonus Tip:
- For extra protection, pour ½ cup of vinegar + 1 tbsp baking soda down drains before leaving to prevent clogs.
When This Trick Is a Lifesaver
- Long trips (2+ weeks)Best vacation packages
- Dry climates (faster evaporation)
- Older homes (prone to plumbing issues)
What Happens If You Skip It?
Final Verdict
This $0 hack takes 10 seconds but can save you from costly repairs and nasty surprises. Next time you travel, don’t just lock up—leave a glass in the sink!
