If that water seal evaporates or the plumbing develops a problem, unpleasant smells may travel back through the drain. This is more likely to be a concern in drains that are rarely used or in plumbing systems with existing defects.
Food residue, grease, soap deposits, and other organic material can also contribute to unpleasant smells. Cleaning the sink and drain area before leaving can help reduce this buildup.
Does the Upside-Down Glass and Paper Towel Trick Work?
The idea is straightforward: place a paper towel over the drain opening and set an upside-down glass on top of it. The glass holds the paper in place and provides a temporary physical cover.
Some people use this method in the hope of limiting odors or preventing insects from entering through the drain opening. However, it should not be considered a reliable or airtight seal. A glass resting over a paper towel may leave gaps, and it does not address the underlying cause of plumbing odors.
If you decide to try it, make sure the glass is stable and cannot easily fall into the sink. Keep this setup away from children and pets, and remember that it is an optional precaution rather than a proven substitute for proper drain maintenance.
How to Prepare Your Sink Before Leaving
A few straightforward steps can help keep your sink in good condition while you are away.
1. Clean the sink and drain area
Remove food scraps, wipe away grease, and clean around the drain opening. This helps reduce residue that may contribute to unpleasant odors.
2. Flush the drain with water
Run water through the sink to help ensure that the plumbing trap contains water before you leave. This is particularly useful if the sink has not been used recently.
3. Avoid mixing cleaning products
Follow the instructions on any drain cleaner or household cleaning product you use. Never mix bleach with vinegar, ammonia, or other cleaning products, as dangerous gases or reactions may result.
4. Check for plumbing problems
If you regularly notice sewer-like smells, slow drainage, or bubbling from the sink, investigate the cause rather than relying on a temporary cover. Persistent odors may require help from a qualified plumber.
5. Consider a suitable drain cover
If insects are a recurring problem, use a properly fitting drain cover or stopper where appropriate. Keep in mind that insects may also enter through windows, gaps, and other openings around the home.
Is an Upside-Down Glass Better Than a Regular Stopper?
Not necessarily. A properly fitting sink stopper is generally designed to cover the drain more effectively than a glass resting on a paper towel. However, neither option fixes a dry plumbing trap, a damaged pipe, or another underlying plumbing issue.
For most households, cleaning the sink, maintaining the water seal in the plumbing trap, and addressing recurring drain problems are more useful precautions than relying on a makeshift cover alone.
A Small Step Before Your Next Trip
Preparing your home before a vacation does not have to be complicated. Cleaning the sink, running water through the drain, and checking for existing plumbing issues can help reduce the likelihood of unpleasant surprises when you return.
The upside-down glass and paper towel method is a simple household idea, but its effectiveness is limited. Treat it as an optional temporary cover, not a guaranteed way to prevent odors or insects.
A little preparation before leaving can help you return to a home that feels fresh, clean, and ready for everyday life again.