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