When it comes to keeping your home free from pests, many people turn to chemical sprays or professional services. But did you know that a simple mentholated ointment commonly found in your medicine cabinet can do wonders as a natural pest repellent?
This ointment, originally intended for relieving coughs and muscle aches, contains powerful ingredients like menthol, camphor, eucalyptus oil, and cedar leaf oil—scents that a wide variety of pests can’t stand. Below, you’ll discover how to use this ointment in 13 clever and effective ways to naturally repel common household invaders.
1. Keep Mosquitoes Away
Rub a small amount of the mentholated ointment on exposed skin such as your ankles, wrists, neck, and behind your ears. The strong scent of menthol, camphor, and eucalyptus oil helps repel mosquitoes effectively.
Additional tip: Leave open jars of the ointment near windows, doors, or under your bed to create a mosquito-free zone indoors.
2. Repel House Flies
To get rid of annoying house flies:
- Smear the ointment on small cloth strips or paper pieces and place them near trash cans, sinks, or food prep areas.
- Leave open containers with a small amount of the ointment in fly-prone areas.
- Mix a small amount of ointment with warm water in a bowl and place it in the room. The evaporating menthol can help drive flies away.
3. Block Ant Trails
Find the cracks, windows, or door frames where ants are entering your home. Use a cotton swab or your finger to apply a small amount of ointment directly to these entry points.
For best results:
- Apply around the base of trash bins.
- Rub along kitchen countertops or near food storage areas.
- Disrupt active ant trails with a thin layer of the ointment to confuse and repel them.
4. Deter Spiders
Spiders dislike the strong scent of menthol and eucalyptus. Rub the ointment around window edges, baseboards, and doorways.
If you find spider webs, apply the ointment nearby to discourage them from returning.
5. Keep Cockroaches Away
Apply the mentholated ointment:
- Around the base of pantry shelves and food containers (never directly on food).
- Near pet bowls and trash cans.
- Along cockroach trails to interrupt their scent paths and stop others from following.
6. Repel Mice and Rats
Rodents strongly dislike the smell of menthol and eucalyptus.
Try this:
- Soak cotton balls or yarn in the ointment and place them behind appliances, near baseboards, in cabinets, or around food storage zones.
- Refresh these placements regularly to keep rodents away from nesting areas.
7. Protect Against Gnats
This ointment contains cedar leaf oil, a natural repellent for gnats.
To use:
- Dab small amounts on your ankles, neck, wrists, and knees.
- It also soothes itchy bug bites if you’ve already been bitten.
8. Prevent Bed Bugs

Apply the ointment to:
- The seams and corners of mattresses.
- Cracks and crevices around the bed frame and headboard.
- The perimeter of your bed legs and under the bed.
This creates a scent barrier that bed bugs struggle to cross.
9. Eliminate Silverfish
Bathrooms are a hot spot for silverfish due to moisture.
Try this spray:
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